Fix typo in version number

.github/workflows/test.yaml

@@ -16,7 +16,7 @@ jobs:
         django: [
           "Django>=4.2,<4.3",
           "Django>=5.0,<5.1",
-          "Django>=51,<6.2",
+          "Django>=5.1,<6.2",
         ]
     steps:
       - uses: actions/checkout@v3