Enable to ping LoongArch group via triagebot

Author: heiher

triagebot.toml

@@ -96,6 +96,17 @@ Thanks! <3
 """
 label = "O-ARM"
 
+[ping.loongarch]
+message = """\
+Hey LoongArch Group! This bug has been identified as a good "LoongArch candidate".
+In case it's useful, here are some [instructions] for tackling these sorts of
+bugs. Maybe take a look?
+Thanks! <3
+
+[instructions]: https://rustc-dev-guide.rust-lang.org/notification-groups/loongarch.html
+"""
+label = "O-loongarch"
+
 [ping.risc-v]
 message = """\
 Hey RISC-V Group! This bug has been identified as a good "RISC-V candidate".