Stop limiting parallel CI jobs (#22)

Author: DoctorJohn

.github/workflows/test.yml

@@ -10,7 +10,6 @@ jobs:
   test:
     runs-on: ubuntu-latest
     strategy:
-      max-parallel: 4
       matrix:
         django-version: ["4.2", "5.0", "5.1", "5.2"]
         python-version: ["3.10", "3.11", "3.12", "3.13"]