[roll pigweed] pw_env_setup: Pin setuptools to 63.4.3

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/107892

https://pigweed.googlesource.com/pigweed/pigweed
pigweed Rolled-Commits: 268c72ad4b2f0b1..3478bcb6472f22e
Roller-URL: https://ci.chromium.org/b/8805080056555182289
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: If47a05a05d168d05e019b54aca2307e3d3d14433
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/zephyr-integration/+/107900
Commit-Queue: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
Bot-Commit: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
diff --git a/pigweed b/pigweed
index 268c72a..3478bcb 160000
--- a/pigweed
+++ b/pigweed
@@ -1 +1 @@
-Subproject commit 268c72ad4b2f0b1109547313b2a397c98e448efc
+Subproject commit 3478bcb6472f22e167269d2352dc93dd8ae9bdea