Update A Comment On An Issue

Updates the content of the specified issue comment. Note that onlythe `content.raw` field can be modified.```$ curl https://api.bitbucket.org/2.0/repositories/atlassian/prlinks/issues/42/comments/5728901 \ -X PUT -u evzijst \ -H 'Content-Type: application/json' \ -d '{"content": {"raw": "Lorem ipsum."}'```