fix: typo in _chunk_cache on line 712 of guild.py (#1792)

Co-authored-by: Katelyn Gigante <clockwork.singularity@gmail.com>

Author: nordbo

interactions/models/discord/guild.py

@@ -711,7 +711,7 @@ async def process_member_chunk(self, chunk: dict) -> None:
                 s = time.monotonic()
 
         total_time = time.perf_counter() - start_time
-        self.chunk_cache = []
+        self._chunk_cache = []
         self.logger.info(f"Cached members for {self.id} in {total_time:.2f} seconds")
         self.chunked.set()