[llvm] [Github] Add pr-subscribers-infrastructure notifications (PR #142697)

[Aiden Grossman via llvm-commits]

https://github.com/boomanaiden154 updated https://github.com/llvm/llvm-project/pull/142697

>From 514ec12105743946108c918a912c73860cbda5ed Mon Sep 17 00:00:00 2001
From: Aiden Grossman <aidengrossman at google.com>
Date: Tue, 3 Jun 2025 23:43:58 +0000
Subject: [PATCH] [Github] Add pr-subscribes-infrastructure notifications

This patch sets up the new PRs labeller for a
pr-subscribers-infrastructure team that can be used for recieving
notifications about infrastructure changes in the monorepo. This is
primarily centered around the .ci directory currently where most of the
action is taking place.
---
 .github/new-prs-labeler.yml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/.github/new-prs-labeler.yml b/.github/new-prs-labeler.yml
index 16ada9e1f072d..da1d1ca9b515d 100644
--- a/.github/new-prs-labeler.yml
+++ b/.github/new-prs-labeler.yml
@@ -1121,3 +1121,6 @@ tablegen:
   - llvm/include/TableGen/**
   - llvm/lib/TableGen/**
   - llvm/utils/TableGen/**
+
+infrastructure:
+  - .ci/**