Bump actions/setup-dotnet from 1 to 2 (#908)

Bumps [actions/setup-dotnet](https://github.com/actions/setup-dotnet) from 1 to 2.
- [Release notes](https://github.com/actions/setup-dotnet/releases)
- [Commits](https://github.com/actions/setup-dotnet/compare/v1...v2)

---
updated-dependencies:
- dependency-name: actions/setup-dotnet
  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>

.github/workflows/buildtest.yaml

@@ -12,15 +12,15 @@ jobs:
         with:
           fetch-depth: 0
       - name: Setup dotnet SDK 3.1
-        uses: actions/setup-dotnet@v1
+        uses: actions/setup-dotnet@v2
         with:
           dotnet-version: '3.1.x'          
       - name: Setup dotnet SDK 5
-        uses: actions/setup-dotnet@v1
+        uses: actions/setup-dotnet@v2
         with:
           dotnet-version: '5.0.x'          
       - name: Setup dotnet SDK 6
-        uses: actions/setup-dotnet@v1
+        uses: actions/setup-dotnet@v2
         with:
           dotnet-version: '6.0.x'          
       # - name: Check Format
@@ -43,15 +43,15 @@ jobs:
         with:
           fetch-depth: 0
       - name: Setup dotnet SDK 3.1
-        uses: actions/setup-dotnet@v1
+        uses: actions/setup-dotnet@v2
         with:
           dotnet-version: '3.1.x'          
       - name: Setup dotnet SDK 5
-        uses: actions/setup-dotnet@v1
+        uses: actions/setup-dotnet@v2
         with:
           dotnet-version: '5.0.x'                
       - name: Setup dotnet SDK 6
-        uses: actions/setup-dotnet@v1
+        uses: actions/setup-dotnet@v2
         with:
           dotnet-version: '6.0.x'          
       - name: Minikube