Bump actions/setup-dotnet from 5 to 6 in /.github/workflows

Bumps [actions/setup-dotnet](https://github.com/actions/setup-dotnet) from 5 to 6.
- [Release notes](https://github.com/actions/setup-dotnet/releases)
- [Commits](https://github.com/actions/setup-dotnet/compare/v5...v6)

---
updated-dependencies:
- dependency-name: actions/setup-dotnet
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/alpha.yml

@@ -89,7 +89,7 @@ jobs:
 
       - name: Setup .NET
         if: ${{ needs.select-runner.outputs.runner == 'windows-latest' }}
-        uses: actions/setup-dotnet@v5
+        uses: actions/setup-dotnet@v6
         with:
           dotnet-version: 10.0
 

.github/workflows/canary.yml

@@ -53,7 +53,7 @@ jobs:
 
       - name: Setup .NET
         if: ${{ steps.merge.outputs.continue == 'true' }}
-        uses: actions/setup-dotnet@v5
+        uses: actions/setup-dotnet@v6
         with:
           dotnet-version: 10.0
 

.github/workflows/msi-build.yml

@@ -14,7 +14,7 @@ jobs:
         uses: actions/checkout@v6
 
       - name: Setup .NET SDK
-        uses: actions/setup-dotnet@v5
+        uses: actions/setup-dotnet@v6
         with:
           dotnet-version: 10.0.x