Fix locking docs markdown fences

Author: dereuromark

docs/en/core-libraries/locking.md

@@ -13,7 +13,7 @@ engines for Redis, Memcached, local files, and no-op/testing usage.
 
 Lock engine configurations are typically defined in **config/app.php**:
 
-``` php
+```php
 'Lock' => [
     'default' => [
         'className' => 'Redis',
@@ -27,7 +27,7 @@ Lock engine configurations are typically defined in **config/app.php**:
 
 You can also configure lock engines at runtime:
 
-``` php
+```php
 use Cake\Lock\Lock;
 
 Lock::setConfig('orders', [
@@ -42,7 +42,7 @@ Lock::setConfig('orders', [
 Lock configurations use the same `className` conventions as other registry-based
 CakePHP services:
 
-``` php
+```php
 Lock::setConfig('default', ['className' => 'Redis']);
 Lock::setConfig('default', ['className' => 'Cake\Lock\Engine\RedisLockEngine']);
 ```
@@ -54,7 +54,7 @@ If an engine cannot be initialized, CakePHP falls back to the noop
 
 Use `Lock::acquire()` to attempt a non-blocking lock:
 
-``` php
+```php
 use Cake\Lock\Lock;
 
 $lock = Lock::acquire('invoice-' . $invoiceId, ttl: 60);
@@ -82,7 +82,7 @@ Explicit release is still recommended for predictable behavior.
 In many cases, `Lock::synchronized()` is the simplest and safest API because it
 guarantees prompt release:
 
-``` php
+```php
 $result = Lock::synchronized(
     'reports-daily',
     function () {
@@ -101,7 +101,7 @@ returns `null`.
 Use `Lock::acquireBlocking()` when you want to wait for a lock to become
 available:
 
-``` php
+```php
 $lock = Lock::acquireBlocking(
     'payment-' . $paymentId,
     ttl: 60,
@@ -126,7 +126,7 @@ The `retryInterval` value is expressed in milliseconds.
 
 CakePHP provides additional helper methods for lock lifecycle management:
 
-``` php
+```php
 if (Lock::isLocked('imports-products')) {
     return;
 }