docs: Update bug tracker link

Change-Id: I6119caebd6257914f02abd97ef53d9ac3ce6bb3a
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/37140
Pigweed-Auto-Submit: Rob Mohr <mohrr@google.com>
Reviewed-by: Keir Mierle <keir@google.com>
Commit-Queue: Auto-Submit <auto-submit@pigweed.google.com.iam.gserviceaccount.com>
diff --git a/docs/index.rst b/docs/index.rst
index 9a02eca..0b495c1 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -12,7 +12,7 @@
   Code Reviews <https://pigweed-review.googlesource.com>
   Mailing List <https://groups.google.com/forum/#!forum/pigweed>
   Chat Room <https://discord.gg/M9NSeTA>
-  Issue Tracker <https://bugs.chromium.org/p/pigweed/issues/list>
+  Issue Tracker <https://bugs.pigweed.dev/>
   CONTRIBUTING.md
   CODE_OF_CONDUCT.md
   docs/embedded_cpp_guide