fix: codeql specify source languages for public build (#1622)

* add run source languages var for codeql

* revert indentation change

Author: manvkaur

eng/ci/public-build.yml

@@ -34,6 +34,8 @@ variables:
     value: true
   - name: codeql.runSourceLanguagesInSourceAnalysis
     value: true
+  - name: codeql.sourceLanguages
+    value: python, powershell
 
 extends:
   template: v1/1ES.Unofficial.PipelineTemplate.yml@1es