Bump microsoft/setup-msbuild from 2.0.0 to 3.0.0 (#26)

Bumps [microsoft/setup-msbuild](https://github.com/microsoft/setup-msbuild) from 2.0.0 to 3.0.0.
- [Release notes](https://github.com/microsoft/setup-msbuild/releases)
- [Commits](microsoft/setup-msbuild@6fb0222...30375c6)

---
updated-dependencies:
- dependency-name: microsoft/setup-msbuild
  dependency-version: 3.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/main.yml

@@ -40,7 +40,7 @@ jobs:
           }
 
       - name: Setup MSBuild
-        uses: microsoft/setup-msbuild@6fb02220983dee41ce7ae257b6f4d8f9bf5ed4ce #v2
+        uses: microsoft/setup-msbuild@30375c66a4eea26614e0d39710365f22f8b0af57 #v3.0.0
 
       - name: Restore NuGet packages
         run: nuget restore MagickViewer/packages.config -PackagesDirectory packages