Publishing NuGet and CC from Ubuntu

* Update release.yml

* Update ci.yml

Author: hjerpbakk

.github/workflows/ci.yml

@@ -31,5 +31,5 @@ jobs:
         chmod +x codecov
         ./codecov -f "./CoverageResults/coverage.opencover.xml" -t ${{ secrets.CODECOV_TOKEN }}
       shell: bash
-      if: matrix.os == 'macOS-latest'
+      if: matrix.os == 'ubuntu-latest'
 

.github/workflows/release.yml

@@ -7,14 +7,9 @@ on:
 jobs:
   build_test_release:
 
-    runs-on: macOS-latest
+    runs-on: ubuntu-latest
 
     steps:
-    - name: Setup .NET Core if needed
-      uses: actions/[email protected]
-      with:
-        dotnet-version: '3.1.x'
-      if: matrix.os == 'macOS-latest'
     - uses: actions/checkout@v1
     - name: Build and test
       run: |