Bump actions/checkout from 5 to 6 (#346)

Author: vcsjones

.github/workflows/codeql.yml

@@ -28,7 +28,7 @@ jobs:
           build-mode: autobuild
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
 
     - name: Initialize CodeQL
       uses: github/codeql-action/init@v4

.github/workflows/pr.yml

@@ -15,7 +15,7 @@ jobs:
         os: ['windows-latest', 'windows-11-arm']
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
       name: Checkout
     - uses: actions/setup-dotnet@v5
       with:
@@ -25,7 +25,7 @@ jobs:
   dependency-review:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
       name: Checkout
     - uses: actions/dependency-review-action@v4
       name: Dependency Review