fix(codeql): switch language matrix to 'actions' (no JS/TS in repo) (#29)

Same root cause as IJ.jl#6: CodeQL was pinned to `language: javascript-typescript` on a repo with no JS/TS source files, so the analyze job failed with a configuration error every run — blocking all Dependabot PRs.

Switches to `actions`, which scans the workflow files every repo has.

Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>

Author: hyperpolymath

.github/workflows/codeql.yml

@@ -21,7 +21,7 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - language: javascript-typescript
+          - language: actions
             build-mode: none
 
     steps: