[PR #9727/4d448aec backport][3.11] gitignore websocket mask and reader_c (#9729)

Co-authored-by: Tambe Tabitha Achere <[email protected]>

Author: patchback[bot]

.gitignore

@@ -43,6 +43,8 @@ aiohttp/_http_writer.c
 aiohttp/_http_writer.html
 aiohttp/_websocket.c
 aiohttp/_websocket.html
+aiohttp/_websocket/mask.c
+aiohttp/_websocket/reader_c.c
 bin
 build
 coverage.xml