ci: bump github/codeql-action to v4.37.8, group its Dependabot updates

Dependabot opened separate PRs for init (#35) and analyze (#34). Each
failed because the two steps must run the same version of the action.
Bump init, analyze and upload-sarif together and add a Dependabot group
so future codeql-action bumps arrive as one PR.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

.github/dependabot.yml

@@ -11,3 +11,8 @@ updates:
     directory: /
     schedule:
       interval: weekly
+    groups:
+      # init and analyze must run the same version, so bump them in one PR.
+      codeql-action:
+        patterns:
+          - github/codeql-action*

.github/workflows/codeql.yml

@@ -25,10 +25,10 @@ jobs:
     steps:
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
 
-      - uses: github/codeql-action/init@42947a340483f03ba47bb1a039b2c519aab3df85 # v3.37.8
+      - uses: github/codeql-action/init@db488ddef3bf6cb639b32c2e9a7c0a7ea8271d28 # v4.37.8
         with:
           languages: javascript-typescript
 
-      - uses: github/codeql-action/analyze@42947a340483f03ba47bb1a039b2c519aab3df85 # v3.37.8
+      - uses: github/codeql-action/analyze@db488ddef3bf6cb639b32c2e9a7c0a7ea8271d28 # v4.37.8
         with:
           category: "/language:javascript-typescript"

.github/workflows/scorecard.yml

@@ -38,6 +38,6 @@ jobs:
           path: results.sarif
           retention-days: 5
 
-      - uses: github/codeql-action/upload-sarif@42947a340483f03ba47bb1a039b2c519aab3df85 # v3.37.8
+      - uses: github/codeql-action/upload-sarif@db488ddef3bf6cb639b32c2e9a7c0a7ea8271d28 # v4.37.8
         with:
           sarif_file: results.sarif