roll: third_party/pigweed 3e9c883..f803d94 (4 commits)

f803d94:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/243260 pw_channel: Discuss backpressure in docs
ec16989:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/243255 pw_containers: Fix intrusive doc lists
5551203:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/243262 roll: fuchsia-infra-bazel-rules 7011a76..b9502a2 (38 commits)
632f1af:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/243292 docs: Update changelog

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: 3e9c8837fbbc3b..f803d94f72bd78
Roll-Count: 1
Roller-URL: https://ci.chromium.org/b/8733693085712987553
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Id0f89a0129c999c9af20f7a69ecaceba069dca65
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/243453
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 3e9c883..f803d94 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 3e9c8837fbbc3b8105c6e1b77e7c14d4c1ad0d4e
+Subproject commit f803d94f72bd7894820bba459d01742f7836ac81