message: branchUrl backward compatibility  if 404 with new format
diff: @@ -32,12 +32,19 @@ export async function getBitbucketDefaultBranch(
  const isHosted = resource === 'bitbucket.org';
  // Bitbucket Server https://docs.atlassian.com/bitbucket-server/rest/7.9.0/bitbucket-rest.html#idp184
  - // Changed branchUrl to support Atlassian Bitbucket v5.11.1 , which has different branchUrl format
  const branchUrl = isHosted
  ? `${config.apiBaseUrl}/repositories/${project}/${repoName}`
  - : `${config.apiBaseUrl}/projects/${project}/repos/${repoName}/branches/default`;
  + : `${config.apiBaseUrl}/projects/${project}/repos/${repoName}/default-branch`;
  +
  + var response = await fetch(branchUrl, getBitbucketRequestOptions(config));
  +
  + if (response.status === 404) {
  + // First try the new format, and then if it gets specifically a 404 it should try the old format
  + // (to support old Atlassian Bitbucket v5.11.1 format )
  + branchUrl = `${config.apiBaseUrl}/projects/${project}/repos/${repoName}/branches/default`;
  + response = await fetch(branchUrl, getBitbucketRequestOptions(config));
  + }
  - const response = await fetch(branchUrl, getBitbucketRequestOptions(config));
  if (!response.ok) {
  const message = `Failed to retrieve default branch from ${branchUrl}, ${response.status} ${response.statusText}`;
  throw new Error(message);
  