Bump actions/cache from 3 to 4

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](https://github.com/actions/cache/compare/v3...v4)

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

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/build.yml

@@ -49,7 +49,7 @@ jobs:
           node-version: ${{ env.NODE_VERSION }}
 
       - name: Set up Node.js dependency cache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         id: cache
         with:
           key: ${{ runner.os }}-${{ hashFiles('**/package-lock.json') }}
@@ -77,7 +77,7 @@ jobs:
           node-version: ${{ env.NODE_VERSION }}
 
       - name: Set up Node.js dependency cache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         id: cache
         with:
           key: ${{ runner.os }}-${{ hashFiles('**/package-lock.json') }}

.github/workflows/documentation.yml

@@ -58,7 +58,7 @@ jobs:
             requirements.txt
 
       - name: Set up build cache
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4
         with:
           key: mkdocs-material-${{ hashfiles('.cache/**') }}
           path: .cache
@@ -112,7 +112,7 @@ jobs:
         uses: actions/deploy-pages@v4
 
       - name: Save build cache
-        uses: actions/cache/save@v3
+        uses: actions/cache/save@v4
         with:
           key: mkdocs-material-${{ hashfiles('.cache/**') }}
           path: .cache