Rename group.create_group and fix example

Author: Dorukyum

discord/commands/commands.py

@@ -799,7 +799,7 @@ def wrap(func) -> SlashCommand:
 
         return wrap
 
-    def create_group(self, name, description) -> SlashCommandGroup:
+    def create_subgroup(self, name, description) -> SlashCommandGroup:
         if self.parent is not None:
             # TODO: Improve this error message
             raise Exception("Subcommands can only be nested once")

examples/app_commands/slash_cog_groups.py

@@ -11,7 +11,7 @@ def __init__(self, bot):
 
     greetings = SlashCommandGroup("greetings", "Various greeting from cogs!")
 
-    international_greetings = greetings.subgroup(
+    international_greetings = greetings.create_subgroup(
         "international", "International greetings"
     )