Add workflow_dispatch to test GH action

Author: brandomr

.github/workflows/pytest_workflow.yml

@@ -1,6 +1,7 @@
 name: Tests
 
 on:
+  workflow_dispatch:
   pull_request:
     branches:
       - main
@@ -39,4 +40,4 @@ jobs:
       with:
         token: ${{ secrets.CODECOV_TOKEN }}
         file: ./coverage.xml
-        fail_ci_if_error: true
+        fail_ci_if_error: true