branch: missing space fix at line 313

The message introduced by commit 593a2a5 (branch: protect branches
checked out in all worktrees, 2021-12-01) is missing a space in the
first line, add it.

Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Author: bagasme

branch.c

@@ -212,7 +212,7 @@ int validate_new_branchname(const char *name, struct strbuf *ref, int force)
 	worktrees = get_worktrees();
 	wt = find_shared_symref(worktrees, "HEAD", ref->buf);
 	if (wt && !wt->is_bare)
-		die(_("cannot force update the branch '%s'"
+		die(_("cannot force update the branch '%s' "
 		      "checked out at '%s'"),
 		    ref->buf + strlen("refs/heads/"), wt->path);
 	free_worktrees(worktrees);