[roll pigweed] pw_env_setup: Use consistent Python version

Previously there wasn't a 3.9.x version of Python for ARM Macs in CIPD.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/105172

https://pigweed.googlesource.com/pigweed/pigweed
pigweed Rolled-Commits: c1676bed1e221ac..24b63afeb0b1edf
Roller-URL: https://ci.chromium.org/b/8806380224031113137
Cq-Cl-Tag: roller-builder:pigweed-zephyr-roller
Cq-Cl-Tag: roller-bid:8806380224031113137
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: If9a0ea6cd2c93a8dc401c1aa1018e456b8a67ddc
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/zephyr-integration/+/105412
Bot-Commit: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
Commit-Queue: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
diff --git a/pigweed b/pigweed
index c1676be..24b63af 160000
--- a/pigweed
+++ b/pigweed
@@ -1 +1 @@
-Subproject commit c1676bed1e221ac1d1c4c04e39db23c21b493479
+Subproject commit 24b63afeb0b1edfa12690764481c98020b80710d