roll: third_party/pigweed fd6d1e6..b2288d8 (2 commits)

b2288d8:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/247633 Revert "pw_bluetooth_proxy: Use std::lock_guard"
d197999:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/247454 docs: Update shortlinks

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: fd6d1e67bf39b9..b2288d8bc5b909
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8731907451344676225
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I5f56300a04afbbf2e7e4bd9a584c9331c311efdb
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/247753
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index fd6d1e6..b2288d8 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit fd6d1e67bf39b950e45974e7997302ba9b07dca9
+Subproject commit b2288d8bc5b9098343d3d9b76c6b3f0d38ddb948