fixed outdated link in workflow

Author: jo-mueller

.github/workflows/test_and_deploy.yml

@@ -3,7 +3,7 @@
 
 name: tests
 
-on: 
+on:
   push:
     branches:
       - master
@@ -46,7 +46,7 @@ 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
 
       # note: if you need dependencies from conda, considering using
@@ -69,7 +69,7 @@ jobs:
 
   deploy:
     # this will run when you have tagged a commit, starting with "v*"
-    # and requires that you have put your twine API key in your 
+    # and requires that you have put your twine API key in your
     # github secrets (see readme for details)
     needs: [test]
     runs-on: ubuntu-latest