ci: ⬆️ bump actions/cache from 4 to 5 (#132)

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-docs-release.yml

@@ -22,7 +22,7 @@ jobs:
         with:
           python-version: "3.10"
 
-      - uses: actions/cache@v4
+      - uses: actions/cache@v5
         with:
           path: ~/.cache/pip
           key: ${{ runner.os }}-pip-apidocs-${{ steps.setup-python.outputs.python-version }}-${{ github.sha }}

.github/workflows/python-build.yml

@@ -21,7 +21,7 @@ jobs:
           python-version: ${{ matrix.python-version }}
           allow-prereleases: true
 
-      - uses: actions/cache@v4
+      - uses: actions/cache@v5
         with:
           path: ~/.cache/pip
           key: ${{ runner.os }}-pip-build-${{ steps.setup-python.outputs.python-version }}-${{ github.sha }}

.github/workflows/python-lint.yml

@@ -17,7 +17,7 @@ jobs:
         with:
           python-version: "3.13"
 
-      - uses: actions/cache@v4
+      - uses: actions/cache@v5
         with:
           path: ~/.cache/pip
           key: ${{ runner.os }}-pip-lint-${{ steps.setup-python.outputs.python-version }}-${{ github.sha }}

.github/workflows/python-test.yml

@@ -22,7 +22,7 @@ jobs:
           allow-prereleases: true
 
 
-      - uses: actions/cache@v4
+      - uses: actions/cache@v5
         with:
           path: ~/.cache/pip
           key: ${{ runner.os }}-pip-test-${{ steps.setup-python.outputs.python-version }}-${{ github.sha }}