ci: disable semgrep static analysis in workflow

Semgrep check is temporarily disabled due to false positives
and limited relevance to current shell/C test coverage. This
can be re-enabled after rules are refined or codebase is adjusted.

Signed-off-by: Srikanth Muppandam <[email protected]>

Author: smuppand

.github/workflows/preflight-checker-workflow.yml

@@ -11,7 +11,7 @@ jobs:
     uses: qualcomm-linux/qli-actions/.github/workflows/multi-checker.yml@main
     with:
         repolinter: true # default: true
-        semgrep: true # default: true
+        semgrep: false # default: true
         copyright-license-detector: true # default: true
         pr-check-emails: true # default: true