roll: third_party/pigweed 54ca0db..4fbb15f (5 commits)

4fbb15f:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/246735 pw_{async2,channel}: Start FAQ sections
1c6d9e8:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/246733 pw_docgen: Remove 11/18/2024 PW Live
2fd2d13:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/246498 pw_log_basic: Add pw_log_string handler backend
6a16fab:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/246692 pw_protobuf: Allow unset oneof callbacks
1dcac6a:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/246412 pw_allocator: Separate PMR from Allocator

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: 54ca0db892863f..4fbb15f2d0bba6
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8732167388208120433
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I77aea403d1eba745614f842ce2ce6faea2004024
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/246753
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 54ca0db..4fbb15f 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 54ca0db892863f6d278dc9ca5be92591d1b9f98b
+Subproject commit 4fbb15f2d0bba6c880bc3805d99cbe01a0916772