Turn on the automatic CI/CD on the master branch on every push

.github/workflows/pytest_master_branch.yml

@@ -4,7 +4,20 @@ name: Pytest master branch
 # branch, after having installed the package with pip.
 # It will run on the latest Ubuntu and on the latest python.
 
-on: workflow_dispatch
+on:
+  # Trigger the workflow on push or pull request,
+  # but only for the main branch
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+  # Also trigger on page_build, as well as release created events
+  page_build:
+  release:
+    types: # This configuration does not affect the page_build event above
+      - created
 
 jobs:
   build: