COMP: Use https instead of git:// to fetch CI helpers script

Author: thewtex

.github/workflows/test_and_deploy.yml

@@ -47,7 +47,7 @@ jobs:
       - name: Install Windows OpenGL
         if: runner.os == 'Windows'
         run: |
-          git clone --depth 1 git://github.com/pyvista/gl-ci-helpers.git
+          git clone --depth 1 https://github.com/pyvista/gl-ci-helpers.git
           powershell gl-ci-helpers/appveyor/install_opengl.ps1
 
       - name: Test