rollback to pull_request

.github/workflows/test.yml

@@ -4,7 +4,7 @@ on:
   push:
     branches:
       - master
-  pull_request_target:
+  pull_request:
     branches:
       - master
 
@@ -20,14 +20,7 @@ jobs:
   test:
     runs-on: scilus-runners
     steps:
-      - name: Checkout repository for PR
-        if: github.event.pull_request.number
-        uses: actions/[email protected]
-        with:
-          ref: refs/pull/${{ github.event.pull_request.number }}/merge
-
       - name: Checkout repository for merge
-        if: ! github.event.pull_request.number
         uses: actions/[email protected]
 
       - name: Fetch python version from repository