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

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] <[email protected]>

Author: dependabot[bot]

.github/workflows/pages.yml

@@ -27,7 +27,7 @@ jobs:
       - uses: ruby/setup-ruby@v1
         with:
           ruby-version: ruby
-      - uses: actions/cache@v4
+      - uses: actions/cache@v5
         with:
           path: |
             ~/.cache/red-datasets

.github/workflows/test.yml

@@ -32,7 +32,7 @@ jobs:
       - uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.ruby-version }}
-      - uses: actions/cache@v4
+      - uses: actions/cache@v5
         if: |
           runner.os == 'Linux'
         with:
@@ -41,7 +41,7 @@ jobs:
           key: ${{ env.CACHE_VERSION }}-${{ runner.os }}-${{ hashFiles('lib/**') }}
           restore-keys: |
             ${{ env.CACHE_VERSION }}-${{ runner.os }}-
-      - uses: actions/cache@v4
+      - uses: actions/cache@v5
         if: |
           runner.os == 'macOS'
         with:
@@ -50,7 +50,7 @@ jobs:
           key: ${{ env.CACHE_VERSION }}-${{ runner.os }}-${{ hashFiles('lib/**') }}
           restore-keys: |
             ${{ env.CACHE_VERSION }}-${{ runner.os }}-
-      - uses: actions/cache@v4
+      - uses: actions/cache@v5
         if: |
           runner.os == 'Windows'
         with: