[llvm] [Github] Workaround a GH action bug causing manually added labels to be removed (PR #65395)

[via llvm-commits]

https://github.com/cor3ntin created https://github.com/llvm/llvm-project/pull/65395:

None

>From 3bcb468c09485db05d95342d62a1c596e345c8a4 Mon Sep 17 00:00:00 2001
From: Corentin Jabot <corentinjabot at gmail.com>
Date: Tue, 5 Sep 2023 19:41:54 +0200
Subject: [PATCH] [Github] Workaround a GH action bug causing manually added
 labels to be removed

---
 .github/workflows/new-prs.yml | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/new-prs.yml b/.github/workflows/new-prs.yml
index 72c58eb6b786778..4c3105243b51bcb 100644
--- a/.github/workflows/new-prs.yml
+++ b/.github/workflows/new-prs.yml
@@ -13,4 +13,5 @@ jobs:
     - uses: actions/labeler at v4
       with:
         configuration-path: .github/new-prs-labeler.yml
-        sync-labels: false
+        # workaround for https://github.com/actions/labeler/issues/112
+        sync-labels: ''