Change runner from depot-ubuntu-24.04 to ubuntu-latest

Author: FelixMalfait

.github/workflows/preview-env-keepalive.yaml

@@ -11,7 +11,7 @@ on:
 jobs:
   preview-environment:
     timeout-minutes: 310
-    runs-on: depot-ubuntu-24.04
+    runs-on: ubuntu-latest
     steps:
       - name: Checkout PR
         uses: actions/checkout@v4