roll: third_party/pigweed 504d4c4..101f17c (2 commits)

101f17c:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/395912 pw_async2: Move motivation into separate doc
06429de:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/188096 docs: Clearly state limits of third-party support

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: 504d4c41afd1b2..101f17c3cb9aff
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8683072123157089841
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I4fa145d8170c225775fa0ddaf622b9eddb8c2973
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/405072
diff --git a/third_party/pigweed b/third_party/pigweed
index 504d4c4..101f17c 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 504d4c41afd1b2bfc08c2920855974535cf9d955
+Subproject commit 101f17c3cb9aff907add959ac4de7e61861d3b2c