Fix scripts/release.py to use main instead of master

Author: nicoddemus

scripts/release.py

@@ -10,16 +10,16 @@
 
 
 def create_branch(version):
-    """Create a fresh branch from upstream/master"""
+    """Create a fresh branch from upstream/main"""
     repo = Repo.init(".")
     if repo.is_dirty(untracked_files=True):
         raise RuntimeError("Repository is dirty, please commit/stash your changes.")
 
     branch_name = f"release-{version}"
-    print(f"{Fore.CYAN}Create {branch_name} branch from upstream master")
+    print(f"{Fore.CYAN}Create {branch_name} branch from upstream main")
     upstream = get_upstream(repo)
     upstream.fetch()
-    release_branch = repo.create_head(branch_name, upstream.refs.master, force=True)
+    release_branch = repo.create_head(branch_name, upstream.refs.main, force=True)
     release_branch.checkout()
     return repo