chore: update GitHub Actions to address Node.js 20 deprecation (#2272)

- actions/checkout: v4 → v6 (Node.js 24)
- actions/setup-dotnet: v4 → v5 (Node.js 24)
- actions/upload-artifact: v4 → v5 (Node.js 24)
- actions/stale: v9 → v10 (Node.js 24)
- lhotari/action-upterm → owenthereal/action-upterm (maintained fork)
- purcell/setup-emacs: @master → @v8.0 (pin to tag)

Agent-Logs-Url: https://github.com/PowerShell/PowerShellEditorServices/sessions/cd687667-7088-4930-a154-7d87e9c55860

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: andyleejordan <2226434+andyleejordan@users.noreply.github.com>

Author: Copilot

.github/workflows/ci-test.yml

@@ -18,10 +18,10 @@ jobs:
       DOTNET_GENERATE_ASPNET_CERTIFICATE: false
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Install dotnet
-        uses: actions/setup-dotnet@v4
+        uses: actions/setup-dotnet@v5
         with:
           cache: true
           cache-dependency-path: '**/*.csproj'
@@ -32,7 +32,7 @@ jobs:
         run: ./tools/installPSResources.ps1
 
       - name: Download PowerShell install script
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           repository: PowerShell/PowerShell
           path: pwsh
@@ -45,7 +45,7 @@ jobs:
 
       - name: If debugging, start upterm for interactive pipeline troubleshooting
         if: ${{ runner.debug == 1 }}
-        uses: lhotari/action-upterm@v1
+        uses: owenthereal/action-upterm@v1
         with:
           wait-timeout-minutes: 1
 
@@ -55,13 +55,13 @@ jobs:
 
       - name: Upload build artifacts
         if: always()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         with:
           name: PowerShellEditorServices-module-${{ matrix.os }}
           path: module
 
       - name: Upload test results
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         if: always()
         with:
           name: PowerShellEditorServices-test-results-${{ matrix.os }}

.github/workflows/close-stale-issues.yml

@@ -11,7 +11,7 @@ jobs:
   stale-resolved-issues:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/stale@v9
+      - uses: actions/stale@v10
         name: Label resolved issues as needing fix verification
         with:
           any-of-labels: "Resolution-Answered,Resolution-Duplicate,Resolution-External,Resolution-Fixed,Resolution-Inactive"
@@ -23,7 +23,7 @@ jobs:
   stale-fixed-issues:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/stale@v9
+      - uses: actions/stale@v10
         name: Close issues needing fix verification after 1 week of inactivity
         with:
           stale-issue-label: "Needs: Fix Verification"
@@ -34,7 +34,7 @@ jobs:
   stale-feedback-issues:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/stale@v9
+      - uses: actions/stale@v10
         name: Close issues needing author feedback after 1 week of inactivity
         with:
           stale-issue-label: "Needs: Author Feedback"

.github/workflows/emacs-test.yml

@@ -18,10 +18,10 @@ jobs:
       DOTNET_GENERATE_ASPNET_CERTIFICATE: false
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Install dotnet
-        uses: actions/setup-dotnet@v4
+        uses: actions/setup-dotnet@v5
         with:
           cache: true
           cache-dependency-path: '**/*.csproj'
@@ -35,7 +35,7 @@ jobs:
         run: Invoke-Build Build
 
       - name: Install Emacs
-        uses: purcell/setup-emacs@master
+        uses: purcell/setup-emacs@v8.0
         with:
           version: '28.2'
 

.github/workflows/vim-test.yml

@@ -18,10 +18,10 @@ jobs:
       DOTNET_GENERATE_ASPNET_CERTIFICATE: false
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Install dotnet
-        uses: actions/setup-dotnet@v4
+        uses: actions/setup-dotnet@v5
         with:
           cache: true
           cache-dependency-path: '**/*.csproj'
@@ -41,13 +41,13 @@ jobs:
           version: nightly
 
       - name: Checkout vim-ps1
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           repository: PProvost/vim-ps1
           path: vim-ps1
 
       - name: Checkout LanguageClient-neovim
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           repository: autozimu/LanguageClient-neovim
           path: LanguageClient-neovim
@@ -57,13 +57,13 @@ jobs:
         working-directory: LanguageClient-neovim
 
       - name: Checkout Themis
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           repository: thinca/vim-themis
           path: vim-themis
 
       # - name: Debug if run with debugging enabled
-      #   uses: lhotari/action-upterm@v1
+      #   uses: owenthereal/action-upterm@v1
 
       - name: Run Themis with full CLI
         env: