Merge pull request #24026 from open-craft/kshitij/cri-174/fix-lti

[CRI-174] [BB-2402] Fix LTI issues due to duplicated Content-Length header

lms/djangoapps/lti_provider/outcomes.py

@@ -168,7 +168,8 @@ def sign_and_send_replace_result(assignment, xml):
         consumer_key,
         consumer_secret,
         signature_method='HMAC-SHA1',
-        force_include_body=True
+        force_include_body=True,
+        decoding=None,
     )
 
     headers = {'content-type': 'application/xml'}