fix: update matrix

Author: Agus Makmun

.github/workflows/run-tests.yml

@@ -83,6 +83,16 @@ jobs:
           - os: macos-latest
             django-version: 5.0
 
+          - os: ubuntu-latest
+            python-version: 3.6
+            django-version: 4.0
+          - os: ubuntu-latest
+            python-version: 3.6
+            django-version: 4.2
+          - os: ubuntu-latest
+            python-version: 3.6
+            django-version: 5.0
+
     steps:
       - name: Install system dependencies (windows)
         if: matrix.os == 'windows-latest'