Bump timheuer/bootstrap-dotnet from 1 to 2 in /.github/workflows

Bumps [timheuer/bootstrap-dotnet](https://github.com/timheuer/bootstrap-dotnet) from 1 to 2.
- [Release notes](https://github.com/timheuer/bootstrap-dotnet/releases)
- [Commits](timheuer/bootstrap-dotnet@v1...v2)

---
updated-dependencies:
- dependency-name: timheuer/bootstrap-dotnet
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/build.yml

@@ -17,7 +17,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: Setup .NET build dependencies
-      uses: timheuer/bootstrap-dotnet@v1
+      uses: timheuer/bootstrap-dotnet@v2
       with:
         nuget: 'false'
         sdk: 'false'