Update actions/checkout action to v5

Author: renovate[bot]

.github/workflows/main.yml

@@ -18,7 +18,7 @@ jobs:
       DOTNET_NOLOGO: 1
       NUGET_PACKAGES: ${{ github.workspace }}/.github/nuget-packages
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - name: Set up .NET SDK
       uses: actions/setup-dotnet@v4
       with:
@@ -36,13 +36,13 @@ jobs:
   encoding:
     runs-on: ubuntu-24.04
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - name: Verify encoding
       shell: pwsh
       run: scripts/Test-Encoding.ps1
   licenses:
     runs-on: ubuntu-24.04
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - name: REUSE license check
       uses: fsfe/reuse-action@v5

.github/workflows/release.yml

@@ -16,7 +16,7 @@ jobs:
       name: Read version from ref
       shell: pwsh
       run: Write-Output "::set-output name=version::$($env:GITHUB_REF -replace '^refs/tags/v', '')"
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - name: Set up .NET SDK
       uses: actions/setup-dotnet@v4
       with: