Update codeql-analysis.yml

 Avoid a code scan to trigger on specific pull requests targeted to only changes in a pull request, to ignore files with the file extensions .md or .txt

Author: krishnaharshap

.github/workflows/codeql-analysis.yml

@@ -5,6 +5,9 @@ on:
     branches: [ "main" ]
   pull_request:
     branches: [ "main" ]
+    paths-ignore:
+         - '**/*.md'
+         - '**/*.txt'
   schedule:
     - cron: "0 2 * * 1"   # Weekly Monday scan