chore(deps): update actions/cache action to v5 (#8797)

Author: renovate-bot

.github/workflows/unit-tests.yaml

@@ -33,7 +33,7 @@ jobs:
         extensions: sodium,${{ matrix.extensions }}
         key: cache-key-1 # increment to bust the cache
     - name: Cache extensions
-      uses: actions/cache@v4
+      uses: actions/cache@v5
       with:
         path: ${{ steps.extcache.outputs.dir }}
         key: ${{ steps.extcache.outputs.key }}