iox-#2011 Fix warning in cache action

.github/workflows/lint_pull_request.yml

@@ -44,16 +44,21 @@ jobs:
       - uses: actions/checkout@v3
 
       - name: Restore lychee cache
-        uses: actions/cache@v3
+        uses: actions/cache/restore@v3
         if: always()
         with:
           path: .lycheecache
           key: cache-lychee-all-branches
-          # the cache will not be updated and therefore needs to be recreated after 7 days
-          retention-days: 7
 
       - name: Link Checker
         uses: lycheeverse/lychee-action@v1.8.0
         with:
           fail: true
           args: --cache --insecure --max-cache-age 7d --verbose --no-progress './**/*.md' --github-token ${{secrets.GITHUB_TOKEN}} --max-concurrency 1
+
+      - name: Save lychee cache
+        uses: actions/cache/save@v3
+        if: always()
+        with:
+          path: .lycheecache
+          key: cache-lychee-all-branches