Bump actions/cache from 4 to 5

Bumps [actions/cache](https://github.com/actions/cache) from 4 to 5.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](https://github.com/actions/cache/compare/v4...v5)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/check_urls.yml

@@ -9,7 +9,7 @@ jobs:
       - uses: actions/checkout@v6
 
       - name: Restore lychee cache
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: .lycheecache
           key: cache-lychee-${{ github.sha }}

.github/workflows/export_web.yml

@@ -5,7 +5,7 @@ on:
       - master
 
 env:
-  GODOT_VERSION: 4.5.1
+  GODOT_VERSION: 4.3
 
 jobs:
   export-html5:
@@ -13,7 +13,7 @@ jobs:
     name: Export projects to Web and deploy to GitHub Pages
     runs-on: ubuntu-24.04
     container:
-      image: barichello/godot-ci:4.5.1
+      image: barichello/godot-ci:4.3
     steps:
       - name: Checkout
         uses: actions/checkout@v6