[meld] Update branch name check to reflect main move

[Kai Willadsen <kaiw src gnome org>]

commit 78d1b17a453441e48b41cbbbe3be202ea691d753
Author: Kai Willadsen <kai willadsen gmail com>
Date:   Tue Sep 6 07:51:34 2022 +1000

    Update branch name check to reflect main move

 maint | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/maint b/maint
index b12edd86..f44161f3 100755
--- a/maint
+++ b/maint
@@ -264,7 +264,7 @@ def call_with_output(
 def check_release_branch():
     cmd = ['git', 'rev-parse', '--abbrev-ref', 'HEAD']
     branch = subprocess.check_output(cmd).strip().decode('utf-8')
-    if branch != 'master' and not re.match(RELEASE_BRANCH_RE, branch):
+    if branch != 'main' and not re.match(RELEASE_BRANCH_RE, branch):
         click.echo(
             '\nBranch "%s" doesn\'t appear to be a release branch.\n' % branch)
         click.confirm('Are you sure you wish to continue?', abort=True)