Update CODEOWNERS for PR #1049 (#1055)

Add @VeVarunSharma as owner for GHAS skills contributed in PR #1049:
- /skills/codeql/
- /skills/dependabot/
- /skills/secret-scanning/

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: 3 people

CODEOWNERS

@@ -35,3 +35,8 @@
 
 # Added via #codeowner from PR #1009
 /skills/publish-to-pages/ @AndreaGriffiths11
+
+# Added via #codeowner from PR #1049
+/skills/codeql/ @VeVarunSharma
+/skills/dependabot/ @VeVarunSharma
+/skills/secret-scanning/ @VeVarunSharma