fix: update CodeQL actions to v4 and drop java-kotlin

- Update github/codeql-action from v3 to v4
- Remove java-kotlin from matrix since build-mode: none is not
  supported for compiled languages and the IntelliJ Platform
  dependencies cannot be resolved in CodeQL's environment

Author: MO2k4

.github/workflows/codeql.yml

@@ -30,20 +30,18 @@ jobs:
             build-mode: none
           - language: csharp
             build-mode: none
-          - language: java-kotlin
-            build-mode: none
 
     steps:
       - name: Checkout
         uses: actions/checkout@v4
 
       - name: Initialize CodeQL
-        uses: github/codeql-action/init@v3
+        uses: github/codeql-action/init@v4
         with:
           languages: ${{ matrix.language }}
           build-mode: ${{ matrix.build-mode }}
 
       - name: Perform CodeQL Analysis
-        uses: github/codeql-action/analyze@v3
+        uses: github/codeql-action/analyze@v4
         with:
           category: "/language:${{ matrix.language }}"