Refactor CodeQL workflow and use correct indentation (#1964)

This pull request updates the CodeQL workflow configuration in
`.github/workflows/codeql.yml` to improve consistency and security
permissions. The main changes are related to workflow syntax,
permissions, and updating action versions.

**Workflow configuration updates:**

* Changed the `cron` schedule string to use double quotes for
consistency.
* Set `runs-on` to always use `ubuntu-latest`, removing the conditional
selection for Swift.

**Security and permissions:**

* Added explicit `contents: read` and `actions: read` permissions for
improved security and clarity.

**Dependency updates:**

* Updated the `actions/checkout` action from version `v4` to `v6` for
the repository checkout step.

Author: iMicknl

.github/workflows/codeql.yml

@@ -6,35 +6,37 @@ on:
   pull_request:
     branches: [ "main" ]
   schedule:
-    - cron: '18 3 * * 1'
+    - cron: "18 3 * * 1"
 
 jobs:
   analyze:
     name: Analyze (${{ matrix.language }})
-    runs-on: ${{ (matrix.language == 'swift' && 'macos-latest') || 'ubuntu-latest' }}
+    runs-on: ubuntu-latest
     permissions:
       security-events: write
+      contents: read
+      actions: read
       packages: read
 
     strategy:
       fail-fast: false
       matrix:
         include:
-        - language: actions
-          build-mode: none
-        - language: python
-          build-mode: none
+          - language: actions
+            build-mode: none
+          - language: python
+            build-mode: none
     steps:
-    - name: Checkout repository
-      uses: actions/checkout@v4
+      - name: Checkout repository
+        uses: actions/checkout@v6
 
-    - name: Initialize CodeQL
-      uses: github/codeql-action/init@v4
-      with:
-        languages: ${{ matrix.language }}
-        build-mode: ${{ matrix.build-mode }}
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v4
+        with:
+          languages: ${{ matrix.language }}
+          build-mode: ${{ matrix.build-mode }}
 
-    - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v4
-      with:
-        category: "/language:${{matrix.language}}"
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v4
+        with:
+          category: "/language:${{matrix.language}}"