chore: Ping Muscraft when rustc_errors::emitter is modified

Author: Muscraft

triagebot.toml

@@ -1068,6 +1068,10 @@ cc = ["@davidtwco", "@compiler-errors", "@TaKO8Ki"]
 message = "`rustc_errors::annotate_snippet_emitter_writer` was changed"
 cc = ["@Muscraft"]
 
+[mentions."compiler/rustc_errors/src/emitter.rs"]
+message = "`rustc_errors::emitter` was changed"
+cc = ["@Muscraft"]
+
 [mentions."compiler/rustc_errors/src/translation.rs"]
 message = "`rustc_errors::translation` was changed"
 cc = ["@davidtwco", "@compiler-errors", "@TaKO8Ki"]