roll: third_party/pigweed 8c06947..d26913d (2 commits)

d26913d:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/314059 pw_async2: Tidy docs
a3967c7:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/313752 doxygen: Migrate modules

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: 8c069470342aed..d26913de0e9858
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8706055951539560273
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Icd9d5c833d706812452add67104671cdd7aadb0e
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/314337
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
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diff --git a/third_party/pigweed b/third_party/pigweed
index 8c06947..d26913d 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 8c069470342aed4c302758145c74324c482054e9
+Subproject commit d26913de0e985851c0247049fc62ab0a6fe9bec2