minor typo fixed. TODO with known bug added

TODO

@@ -0,0 +1,5 @@
+known bugs:
+
+- there is html-code in some plain text mails, because they use
+  models.TYPE_CHOICES, which is in html, because it is mainly used for the
+  website side of things.

input/views.py

@@ -27,7 +27,7 @@ def auth_deny(choice,pk,auth):
     elif choice == 'IFG':
         IFG.set_granted(pk,auth)
     else:
-        return HttpResponse(f'ERROR! UNKNWON CHOICE TYPE! {choice}')
+        return HttpResponse(f'ERROR! UNKNOWN CHOICE TYPE! {choice}')
     return False
 
 @login_required