Bump actions/cache from 4 to 5 (#65)

.github/workflows/backup.yml

@@ -12,7 +12,7 @@ jobs:
 
     steps:
       - name: Configure cache
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: |
             ${{ env.GITHUB_WORKSPACE }}
@@ -20,7 +20,7 @@ jobs:
           key: ${{ runner.os }}
 
       - name: Install the correct Python version
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@v5
         with:
           python-version: '3.x'