Update Bitbucket API documentation to allow redirects from response 302

#!python

curl -v --user username:password https://api.bitbucket.org/2.0/repositories/{username}/{repo_slug}/pullrequests/{pull_request_id}/diff

#!python

...

< HTTP/1.1 302 Found

...

* Curl_http_done: called premature == 0
* Connection BCLOUD-0 to host api.bitbucket.org left intact