ci: ⬆️ bump actions/cache from 3 to 4 (#86)

Bumps [actions/cache](https://github.com/actions/cache) from 3 to 4.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v3...v4)

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

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

.github/workflows/api-docs-release.yml

@@ -22,7 +22,7 @@ jobs:
         with:
           python-version: "3.10"
 
-      - uses: actions/cache@v3
+      - uses: actions/cache@v4
         with:
           path: ~/.cache/pip
           key: ${{ runner.os }}-pip-apidocs-${{ steps.setup-python.outputs.python-version }}-${{ github.sha }}

.github/workflows/python-build.yml

@@ -20,7 +20,7 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
 
-      - uses: actions/cache@v3
+      - uses: actions/cache@v4
         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: "3.10"
 
-      - uses: actions/cache@v3
+      - uses: actions/cache@v4
         with:
           path: ~/.cache/pip
           key: ${{ runner.os }}-pip-lint-${{ steps.setup-python.outputs.python-version }}-${{ github.sha }}

.github/workflows/python-test.yml

@@ -20,7 +20,7 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
 
-      - uses: actions/cache@v3
+      - uses: actions/cache@v4
         with:
           path: ~/.cache/pip
           key: ${{ runner.os }}-pip-test-${{ steps.setup-python.outputs.python-version }}-${{ github.sha }}