build(deps): bump actions/cache from 4 to 5

Bumps [actions/cache](https://github.com/actions/cache) from 4 to 5.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v4...v5)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -57,7 +57,7 @@ jobs:
           - { type: detectors, schema: mon }
           - { type: physics,   schema: dst }
     steps:
-      - uses: actions/cache@v4
+      - uses: actions/cache@v5
         id: cache
         with:
           key: validation_files_lfs_${{ matrix.type }}
@@ -90,7 +90,7 @@ jobs:
         type: [ detectors, physics ]
     steps:
       - uses: actions/checkout@v6
-      - uses: actions/cache/restore@v4
+      - uses: actions/cache/restore@v5
         with:
           key: validation_files_lfs_${{ matrix.type }}
           path: validation_files.tar.zst
@@ -136,7 +136,7 @@ jobs:
         type: [ detectors, physics ]
     steps:
       - uses: actions/checkout@v6
-      - uses: actions/cache/restore@v4
+      - uses: actions/cache/restore@v5
         with:
           key: validation_files_lfs_${{ matrix.type }}
           path: validation_files.tar.zst