Update ci-3p-django-framework.yml

.github/workflows/ci-3p-django-framework.yml

@@ -12,6 +12,7 @@ on:
         type: string
 
 env:
+  TESTTREE: ${{ inputs.testtree || 'main' }}
   TESTNAME: django-framework
   TESTDIST: debian12
   SHA: ${{ inputs.trigger && fromJson(inputs.trigger).event.workflow_run.head_sha || github.sha }}
@@ -51,7 +52,7 @@ jobs:
       uses: actions/checkout@v4
       with:
         repository: 'proxysql/proxysql_3p_testing'
-        ref: 'main'
+        ref: ${{ env.TESTTREE }}
         fetch-depth: 1
         path: 'proxysql_3p_testing'
         token: ${{ secrets.gh_token }}