Limit the Number of Testing Runs in GH Actions (#743)

* limit testing runs

* add review_requested for when tests get run as distinct from ready for review

* add dummy change to test settings

* Revert "add dummy change to test settings"

This reverts commit 768d5e7.

* reinstate dummy change

* Revert "reinstate dummy change"

This reverts commit 62f7cbc.

Author: johnjasa

.github/workflows/ci.yml

@@ -1,13 +1,16 @@
 name: Testing
 on:
-  push:
-    branches:
-      - main
-      - develop
   pull_request:
     branches:
       - main
       - develop
+    types:
+      - opened
+      - ready_for_review
+      - review_requested
+      - enqueued
+    paths:
+      - h2integrate/**.py
   schedule:
     - cron: 0 0 * * MON
 jobs: