Merge pull request #2517 from jieyouxu/lang-team-default-branch

Change `lang-team` default branch to `main`

Author: jackh726

repos/rust-lang/lang-team.toml

@@ -12,5 +12,5 @@ types = "maintain"
 release = "maintain"
 
 [environments.github-pages]
-branches = ["gh-pages", "master"]
+branches = ["gh-pages", "main"]