Try using bash

.github/workflows/build-and-test.yml

@@ -15,10 +15,10 @@ jobs:
         strategy:
             matrix:
                 options:
-                    - os: ubuntu-latest
+                    # - os: ubuntu-latest
-                      framework: netcoreapp3.1
+                    #   framework: netcoreapp3.1
-                      runtime: -x64
+                    #   runtime: -x64
-                      codecov: false
+                    #   codecov: false
                     # - os: windows-latest
                     #   framework: netcoreapp3.1
                     #   runtime: -x64
@@ -45,6 +45,7 @@ jobs:
               uses: NuGet/setup-nuget@v1
 
             - name: Setup Git
+              shell: bash
               run: |
                   git config --global core.autocrlf false
                   git config --global core.longpaths true