fix: CodeQL warning

Specify an `on.push` hook so that Code Scanning can compare pull requests against the state of the base branch.

Author: KEINOS

.github/workflows/codeQL-analysis.yaml

@@ -8,9 +8,7 @@ name: "CodeQL"
 
 on:
   workflow_dispatch:
-  pull_request:
-    branches:
-      - main
+  push:
   schedule:
     # Runs at 16:30 UTC on day-of-month 1 (Every day-of-month 1 at AM 01:30 JST, my time)
     # See: https://crontab.guru/