Need a custom CodeQL workflow to get it to use Swift 6.2

Author: gwynne

.github/workflows/codeql.yml

@@ -0,0 +1,43 @@
+name: CodeQL
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+  schedule:
+    - cron: '0 0 * * 1'
+
+jobs:
+  analyze:
+    name: Analyze (${{ matrix.language }})
+    permissions:
+      security-events: write
+      actions: read
+      contents: read
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+        - language: actions
+          build-mode: none
+        - language: swift
+          build-mode: autobuild
+    runs-on: ${{ (matrix.language == 'swift' && 'macos-latest') || 'ubuntu-latest' }}
+    steps:
+    - name: Select an Xcode which provides Swift 6.2.4
+      if: ${{ matrix.language == 'swift' }}
+      uses: maxim-lobanov/setup-xcode@ed7a3b1fda3918c0306d1b724322adc0b8cc0a90 # v1.7.0
+      with:
+        xcode-version: '26.3'
+    - name: Checkout repository
+      uses: actions/checkout@v6
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v4
+      with:
+        languages: ${{ matrix.language }}
+        queries: security-extended
+        build-mode: ${{ matrix.build-mode }}
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v4
+      with:
+        category: "/language:${{matrix.language}}"