Bump microsoft/setup-msbuild from 1.1 to 1.2 (#2867)

Bumps [microsoft/setup-msbuild](https://github.com/microsoft/setup-msbuild) from 1.1 to 1.2.
- [Release notes](https://github.com/microsoft/setup-msbuild/releases)
- [Changelog](https://github.com/microsoft/setup-msbuild/blob/master/building-release.md)
- [Commits](https://github.com/microsoft/setup-msbuild/compare/v1.1...v1.2)

---
updated-dependencies:
- dependency-name: microsoft/setup-msbuild
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/build-ilspy.yml

@@ -27,7 +27,7 @@ jobs:
         fetch-depth: 0
 
     - name: Add msbuild to PATH
-      uses: microsoft/setup-msbuild@v1.1
+      uses: microsoft/setup-msbuild@v1.2
 
     - name: Install dotnet-format
       run: dotnet tool install -g dotnet-format --version "6.2.315104" --add-source https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet6/nuget/v3/index.json