Revert "[CI] Update list of .NET versions tested against."

This reverts commit 9ffc9a4.

Author: vyazelenko

.github/workflows/ci.yml

@@ -68,7 +68,7 @@ jobs:
  strategy:
  fail-fast: false
  matrix:
- dotnet: [ '3.1.301', '5.x', '6.x', '7.x' ]
+ dotnet: [ '3.1.301' ]
  env:
  DOTNET_SKIP_FIRST_TIME_EXPERIENCE: true
  DOTNET_CLI_TELEMETRY_OPTOUT: 1
@@ -95,10 +95,9 @@ jobs:
  restore-keys: |
  ${{ runner.os }}-nuget-
  - name: Setup dotnet
- uses: actions/setup-dotnet@v3
+ uses: actions/setup-dotnet@v2
  with:
  dotnet-version: ${{ matrix.dotnet }}
- dotnet-quality: 'ga'
  - name: Build
  run: ./csharp/build.sh
  - name: Run tests
@@ -268,7 +267,7 @@ jobs:
  tar xf cmake-${CMAKE_VERSION}-Darwin-x86_64.tar.gz
  echo "cmake-${CMAKE_VERSION}-Darwin-x86_64/CMake.app/Contents/bin" >> $GITHUB_PATH
  - name: Build
- run: ./cppbuild/cppbuild
+ run: cmake --version && ./cppbuild/cppbuild
 
  cpp-msvc-build:
  name: C++ MSVC (Windows)