Merge pull request mockingbirdnest#3938 from pleroy/Actions

Run the keep_alive worflow at noon every four days

.github/workflows/keep_alive.yaml

@@ -2,7 +2,7 @@ name: Keep runners alive
 
 on:
   schedule:
-    - cron: '0/15 * * * *'
+    - cron: '0 12 */4 * *'
 
 permissions:
   id-token: write