[roll third_party/pigweed] pw_env_setup: Update cipd version

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/77784

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: e4be88b8eafb635..51ff972f0cbe8f5
Roller-URL: https://ci.chromium.org/b/8825379931557244913
Cq-Cl-Tag: roller-builder:pigweed-sample-project-roller
Cq-Cl-Tag: roller-bid:8825379931557244913
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I0617dc48d7f245f7a65fcffe30ce97f90872f4af
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/sample_project/+/77821
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/third_party/pigweed b/third_party/pigweed
index e4be88b..51ff972 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit e4be88b8eafb6354b31cd1aff5fd00fb36adc387
+Subproject commit 51ff972f0cbe8f5c414a666ea92af38e80db8cc7