fix(codeql): analyse the languages this repository actually has

`codeql database finalize` was exiting 32 on every run:

    CodeQL could not process any code written in JavaScript/TypeScript.

The matrix asserted javascript-typescript, which this repository does not contain.
Its languages are: none.

This is not only a failing check. The crash uploads no SARIF, so a
`code_scanning` ruleset rule requiring CodeQL waits forever on "Code scanning
is waiting for results from CodeQL" — one fault, two symptoms. Relaxing the
rule's thresholds could not have helped, because no results arrive at all.

New matrix: actions. `actions` is valid in every repository (every
repository has workflow files) and keeps this workflow producing a check and a
SARIF upload even where CodeQL can analyse nothing else — most of this estate
is written in languages CodeQL does not support.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Signed-off-by: Jonathan D.A. Jewell <6759885+hyperpolymath@users.noreply.github.com>

Author: hyperpolymath

.github/workflows/codeql.yml

@@ -30,9 +30,8 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - language: javascript-typescript
+          - language: actions
             build-mode: none
-
     steps:
       - name: Checkout
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2