fix(ci): add language: actions to codeql.yml matrix (WF020)

Adds the actions extractor alongside javascript-typescript so GitHub
Actions workflow YAML is scanned for CI/CD weaknesses (injection,
permission issues). Fixes Hypatia WF020 codeql_missing_actions_language.

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

Author: hyperpolymath

.github/workflows/codeql.yml

@@ -24,6 +24,8 @@ jobs:
         include:
           - language: javascript-typescript
             build-mode: none
+          - language: actions
+            build-mode: none
 
     steps:
       - name: Checkout