fix: Workaround E0119 trait conflict introduced by time v0.3.48

[ReenigneCA]

Constrains the time dependency in Cargo.toml to fix a broken build caused by the recent time v0.3.48 release.

time 0.3.48 introduces an upstream trait implementation that conflicts with rcgen's generic impl<T: Into<String>> From<T> bounds for OtherNameValue and DnValue. Without this constraint, running cargo update && cargo build fails with an E0119: conflicting implementations error.

Updating Cargo.toml to reject time 0.3.48 fixes cargo update for rcgen and downstream users until the incompatibility can be resolved.

rustc error context

error[E0119]: conflicting implementations of trait `From<format_description::parse::format_item::HourBase>` for type `<format_description::parse::format_item::HourBase as format_description::parse::format_item::ModifierValue>::Type`
   --> rcgen/src/lib.rs:359:1
    |
359 | / impl<T> From<T> for OtherNameValue
360 | | where
361 | |     T: Into<String>,
    | |____________________^
    |
    = note: conflicting implementation in crate `time`:
            - impl From<format_description::parse::format_item::HourBase> for <format_description::parse::format_item::HourBase as format_description::parse::format_item::ModifierValue>::Type;
    = note: upstream crates may add a new impl of trait `std::convert::Into<std::string::String>` for type `time::format_description::parse::format_item::HourBase` in future versions

error[E0119]: conflicting implementations of trait `From<format_description::parse::format_item::HourBase>` for type `<format_description::parse::format_item::HourBase as format_description::parse::format_item::ModifierValue>::Type`
   --> rcgen/src/lib.rs:452:1
    |
452 | / impl<T> From<T> for DnValue
453 | | where
454 | |     T: Into<String>,
    | |____________________^
    |
    = note: conflicting implementation in crate `time`:
            - impl From<format_description::parse::format_item::HourBase> for <format_description::parse::format_item::HourBase as format_description::parse::format_item::ModifierValue>::Type;
    = note: upstream crates may add a new impl of trait `std::convert::Into<std::string::String>` for type `time::format_description::parse::format_item::HourBase` in future versions

For more information about this error, try `rustc --explain E0119`.
error: could not compile `rcgen` (lib) due to 2 previous errors

[ctz]

This would be worse than the current state, where users can simply pin a non-broken (either the previous, or subsequent, versions).

[djc]

This should happen in your lockfile.