bump actions/cache from 4 to 5 (#594)

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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/Code_Coverage.yml

@@ -51,7 +51,7 @@ jobs:
 
       # ── CPM cache ─────────────────────────────────────────────────────
       - name: Cache CPM packages
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ~/.cache/cpm
           key: cpm-ubuntu-coverage-${{ hashFiles('**/CMakeLists.txt') }}

.github/workflows/sanitizers.yml

@@ -154,7 +154,7 @@ jobs:
 
       # ── CPM cache ─────────────────────────────────────────────────────
       - name: Cache CPM packages
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ~/.cache/cpm
           key: cpm-ubuntu-san-${{ hashFiles('**/CMakeLists.txt') }}

.github/workflows/static_analysis.yml

@@ -48,7 +48,7 @@ jobs:
         uses: seanmiddleditch/gha-setup-ninja@v5
 
       - name: Cache CPM packages
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ~/.cache/cpm
           key: cpm-ubuntu-tidy-${{ hashFiles('**/CMakeLists.txt') }}