Fix typo for NFC cards

counter/views.py

@@ -115,7 +115,7 @@ class StudentCardForm(forms.ModelForm):
         cleaned_data = super(StudentCardForm, self).clean()
         uid = cleaned_data.get("uid", None)
         if not uid or not StudentCard.is_valid(uid):
-            raise forms.ValidationError(_("This uid is invalid"), code="invalid")
+            raise forms.ValidationError(_("This UID is invalid"), code="invalid")
         return cleaned_data