update django from 4.2.14 to 4.2.15 in dev.txt

requirements/dev.txt

@@ -224,9 +224,9 @@ distlib==0.3.8 \
     --hash=sha256:034db59a0b96f8ca18035f36290806a9a6e6bd9d1ff91e45a7f172eb17e51784 \
     --hash=sha256:1530ea13e350031b6312d8580ddb6b27a104275a31106523b8f123787f494f64
     # via virtualenv
-django==4.2.14 \
-    --hash=sha256:3ec32bc2c616ab02834b9cac93143a7dc1cdcd5b822d78ac95fc20a38c534240 \
-    --hash=sha256:fc6919875a6226c7ffcae1a7d51e0f2ceaf6f160393180818f6c95f51b1e7b96
+django==4.2.15 \
+    --hash=sha256:61ee4a130efb8c451ef3467c67ca99fdce400fedd768634efc86a68c18d80d30 \
+    --hash=sha256:c77f926b81129493961e19c0e02188f8d07c112a1162df69bfab178ae447f94a
     # via
     #   django-debug-toolbar
     #   django-extensions