Upgrade to v4 of CodeQL actions

v3 is deprecated [1]

[1] https://github.blog/changelog/2025-10-28-upcoming-deprecation-of-codeql-action-v3/

Signed-off-by: Andy Wilkinson <[email protected]>

Author: wilkinsona

.github/workflows/codeql-analysis.yml

@@ -33,7 +33,7 @@ jobs:
 
       # Initializes the CodeQL tools for scanning.
       - name: Initialize CodeQL
-        uses: github/codeql-action/init@v3
+        uses: github/codeql-action/init@v4
         with:
           languages: 'actions'
           build-mode: 'none'
@@ -43,4 +43,4 @@ jobs:
       # We are only doing actions which does not require a build
 
       - name: Perform CodeQL Analysis
-        uses: github/codeql-action/analyze@v3
+        uses: github/codeql-action/analyze@v4