build(deps): bump actions/cache from 4 to 5 (#1001)

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/api_test.yml

@@ -55,23 +55,23 @@ jobs:
           python-version: '3.10'
 
       - name: Cache Go modules
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ~/go/pkg/mod
           key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
           restore-keys: |
             ${{ runner.os }}-go-
 
       - name: Cache C++ extensions
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: openviking/pyagfs
           key: ${{ runner.os }}-cpp-${{ hashFiles('**/CMakeLists.txt', '**/*.cpp', '**/*.h') }}
           restore-keys: |
             ${{ runner.os }}-cpp-
 
       - name: Cache Python dependencies
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ~/.cache/pip
           key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt', '**/pyproject.toml') }}