commands: update annotation from typing.Dict -> dict in cli.py

Signed-off-by: John Mulligan <jmulligan@redhat.com>

sambacc/commands/cli.py

@@ -118,7 +118,7 @@ def assemble(
             add_command(subparsers, cmd)
         return parser
 
-    def dict(self) -> typing.Dict[str, Command]:
+    def dict(self) -> dict[str, Command]:
         """Return a dict mapping command names to Command object."""
         return {c.name: c for c in self._commands}