rerun CI weekly for cache keepalive

Author: HeliumAnt

.github/workflows/ci.yml

@@ -10,6 +10,9 @@ on:
     types: [checks_requested]
 
   workflow_dispatch:
+  
+  schedule:
+    - cron: '1 0 * * 0'
 
 # Cancel in-progress runs if newer changes to the same branch/PR are pushed.
 concurrency:
@@ -21,4 +24,4 @@ jobs:
     uses: ./.github/workflows/meson.yml
 
   msbuild:
-    uses: ./.github/workflows/msbuild.yml
+    uses: ./.github/workflows/msbuild.yml