chore(deps): update actions/cache action to v4

.gitea/workflows/renovate.yml

@@ -10,13 +10,13 @@ on:
 jobs:
   renovate:
     runs-on: ubuntu-22.04
-    container: ghcr.io/renovatebot/renovate:37.133.0
+    container: ghcr.io/renovatebot/renovate:37.139.3
     steps:
       - uses: actions/checkout@v4
 
       - name: Restore Renovate Cache
         id: cache-renovate
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4
         with:
           path: /tmp/renovate/cache
           key: ${{ runner.os }}-renovate-cache
@@ -33,7 +33,7 @@ jobs:
 
       - name: Save Renovate Cache
         id: cache-renovate
-        uses: actions/cache/save@v3
+        uses: actions/cache/save@v4
         with:
           path: /tmp/renovate/cache
           key: ${{ runner.os }}-renovate-cache