[llvm] [AVR] Fix broken link in README.md (PR #146821)

[Tom Vijlbrief via llvm-commits]

https://github.com/tomtor created https://github.com/llvm/llvm-project/pull/146821

Fix broken link

>From 9dffdd140e1acbdab8d6c26aa6007b1e907c04f1 Mon Sep 17 00:00:00 2001
From: Tom Vijlbrief <tvijlbrief at gmail.com>
Date: Thu, 3 Jul 2025 07:50:59 +0200
Subject: [PATCH] Update README.md

Fix broken link
---
 llvm/lib/Target/AVR/README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/llvm/lib/Target/AVR/README.md b/llvm/lib/Target/AVR/README.md
index bd8b453aa81ea..2bcf63cf7581d 100644
--- a/llvm/lib/Target/AVR/README.md
+++ b/llvm/lib/Target/AVR/README.md
@@ -4,5 +4,5 @@ This experimental backend is for the 8-bit Atmel [AVR](https://en.wikipedia.org/
 
 ## Useful links
 
-* [Unresolved bugs](https://llvm.org/bugs/buglist.cgi?product=libraries&component=Backend%3A%20AVR&resolution=---&list_id=109466)
+* [Unresolved bugs](https://github.com/llvm/llvm-project/labels/backend%3AAVR)
 * [Architecture notes](https://github.com/avr-llvm/architecture)