fix(ci): remove duplicate --fail flag from trufflehog extra_args

The trufflehog action already passes --fail internally. Having it
in extra_args causes "flag 'fail' cannot be repeated" error.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: hyperpolymath

.github/workflows/secret-scanner.yml

@@ -20,7 +20,7 @@ jobs:
       - name: TruffleHog Secret Scan
         uses: trufflesecurity/trufflehog@6c05c4a00b91aa542267d8e32a8254774799d68d # v3
         with:
-          extra_args: --only-verified --fail
+          extra_args: --only-verified
 
   gitleaks:
     runs-on: ubuntu-latest