Bump actions/cache from 4 to 5 (#346)

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

Author: dependabot[bot]

.github/workflows/Documenter.yml

@@ -50,7 +50,7 @@ jobs:
       - name: Save Julia depot cache on cancel or failure
         id: julia-cache-save
         if: cancelled() || failure()
-        uses: actions/cache/save@v4
+        uses: actions/cache/save@v5
         with: 
           path: |
             ${{ steps.julia-cache.outputs.cache-paths }}