Rollup merge of #161438 - Kobzol:libs-fcp, r=nia-e

Change triagebot backport to ping T-libs-fcp

Discussed in https://rust-lang.zulipchat.com/#narrow/channel/542373-t-libs.2Fbackports/topic/.23161430.3A.20beta-nominated/with/617851159.

r? @nia-e

Author: jhpratt

triagebot.toml

@@ -850,7 +850,7 @@ zulip_stream = 542373 # #t-libs/backports
 topic = "#{number}: beta-nominated"
 message_on_add = [
     """\
-@*T-libs* PR #{number} "{title}" has been nominated for beta backport.
+@*T-libs-fcp* PR #{number} "{title}" has been nominated for beta backport.
 """,
     """\
 /poll Should #{number} be beta backported?
@@ -874,7 +874,7 @@ zulip_stream = 542373 # #t-libs/backports
 topic = "#{number}: stable-nominated"
 message_on_add = [
     """\
-@**channel** PR #{number} "{title}" has been nominated for stable backport.
+@*T-libs-fcp* PR #{number} "{title}" has been nominated for stable backport.
 """,
     """\
 /poll Approve stable backport of #{number}?