(maint): Bump actions/cache from 2 to 4

Bumps [actions/cache](https://github.com/actions/cache) from 2 to 4.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v2...v4)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/build.yml

@@ -48,7 +48,7 @@ jobs:
         run: git fetch --prune --unshallow
 
       - name: Cache Tools
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: tools
           key: ${{ runner.os }}-tools-${{ hashFiles('recipe.cake') }}

.github/workflows/publishDocs.yml

@@ -21,7 +21,7 @@ jobs:
         ref: ${{ github.event.ref }}
 
     - name: Cache Tools
-      uses: actions/cache@v2
+      uses: actions/cache@v4
       with:
         path: tools
         key: ${{ runner.os }}-doc-tools-${{ hashFiles('recipe.cake') }}

.github/workflows/release-notes.yml

@@ -15,7 +15,7 @@ jobs:
       - name: Fetch all tags and branches
         run: git fetch --prune --unshallow
       - name: Cache Tools
-        uses: actions/cache@v2.1.4
+        uses: actions/cache@v4
         with:
           path: tools
           key: ${{ runner.os }}-tools-${{ hashFiles('recipe.cake') }}