[Bitbucket] Fixed broken update_file and upload_file API calls (fixes issue #1080) (#1092)

* [Bitbucket] Fixed broken update_file and upload_file API calls

* Black formatting

Co-authored-by: Gonchik Tsymzhitov <gonchik.tsymzhitov@gmail.com>

Author: jnbolito

atlassian/bitbucket/__init__.py

@@ -2649,7 +2649,7 @@ def upload_file(self, project_key, repository_slug, content, message, branch, fi
         """
         url = self._url_file(project_key, repository_slug, filename)
         data = {"content": content, "message": message, "branch": branch}
-        return self.put(url, files=data)
+        return self.put(url, files=data, headers={"Accept": "application/json"})
 
     def update_file(
         self,
@@ -2679,7 +2679,7 @@ def update_file(
             "branch": branch,
             "sourceCommitId": source_commit_id,
         }
-        return self.put(url, files=data)
+        return self.put(url, files=data, headers={"Accept": "application/json"})
 
     def search_code(self, team, search_query, page=1, limit=10):
         """

atlassian/service_desk.py

@@ -524,11 +524,7 @@ def attach_temporary_file(self, service_desk_id, filename):
 
         with open(filename, "rb") as file:
             result = (
-                self.post(
-                    path=url,
-                    headers=experimental_headers,
-                    files={"file": file},
-                )
+                self.post(path=url, headers=experimental_headers, files={"file": file})
                 .json()
                 .get("temporaryAttachments")
             )