Merge branch 'techknowlogick-develop-patch-80718' into 'develop'

Allow files with upper case extensions when uploading avatar

See merge request funkwhale/funkwhale!1022

api/funkwhale_api/common/serializers.py

@@ -219,7 +219,7 @@ class StripExifImageField(serializers.ImageField):
         with io.BytesIO() as output:
             image_without_exif.save(
                 output,
-                format=PIL.Image.EXTENSION[os.path.splitext(file_obj.name)[-1]],
+                format=PIL.Image.EXTENSION[os.path.splitext(file_obj.name)[-1].lower()],
                 quality=100,
             )
             content = output.getvalue()