Update test workflow to act on PRs not pushes

.github/workflows/ci.yml

@@ -1,22 +1,28 @@
 name: "Build and test"
 on:
-  - push
+  pull_request:
+    types:
+      - ready_for_review
+    branches:
+      - develop
+  workflow_dispatch:
 jobs:
   qa:
+    if: github.event.pull_request.draft == false
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
-          python-version: "3.11"
+          python-version: "3.12"
       - uses: pre-commit/[email protected]
   test:
     needs: qa
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
-          python-version: "3.11"
+          python-version: "3.12"
       - run: pip install -r requirements-dev.txt
       - run: pytest tests