[roll third_party/pigweed] workspace: Updates bazel_embedded version

This fixes issues with fetching the arm-none-gcc compiler.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/61101

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 40b9db09c7b1e46..b371831aa7e22e8
Roller-URL: https://ci.chromium.org/b/8835975090162939041
Cq-Cl-Tag: roller-builder:pigweed-sample-project-roller
Cq-Cl-Tag: roller-bid:8835975090162939041
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Iad0fe8a64424c2de87e0c28a0a937710b910146a
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/sample_project/+/61140
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 40b9db0..b371831 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 40b9db09c7b1e46320d2733d0cbdb646c0c56e3d
+Subproject commit b371831aa7e22e83a4322aaf46d600b839a7e974