chores: Don't run CodeQL on every commit

Author: linkdotnet

.github/workflows/codeql.yml

@@ -1,10 +1,17 @@
-name: "CodeQL"
+name: "CodeQL"
 
 on:
-  push:
-    branches: [main]
-  pull_request:
-    branches: [main]
+  schedule:
+    #        ┌───────────── minute (0 - 59)
+    #        │  ┌───────────── hour (0 - 23)
+    #        │  │ ┌───────────── day of the month (1 - 31)
+    #        │  │ │ ┌───────────── month (1 - 12 or JAN-DEC)
+    #        │  │ │ │ ┌───────────── day of the week (0 - 6 or SUN-SAT)
+    #        │  │ │ │ │
+    #        │  │ │ │ │
+    #        │  │ │ │ │
+    #        *  * * * *
+    - cron: '30 1 * * 0'
 
 jobs:
   CodeQL-Build:
@@ -29,4 +36,4 @@ jobs:
         uses: github/codeql-action/autobuild@v1
 
       - name: Perform CodeQL Analysis
-        uses: github/codeql-action/analyze@v1
+        uses: github/codeql-action/analyze@v1