roll: third_party/pigweed 52e02e8..afff1c5 (2 commits)

afff1c5:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/369612 pw_build: Add test for artifacts manifest generation to workflows test
1bda25f:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/375014 pw_async2: Add CustomFutureList::Remove

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: 52e02e8bbaca9a..afff1c56833965
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8689927089022964881
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I46c40b6d1da134c7ada3a376a4156149a910f797
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/375594
diff --git a/third_party/pigweed b/third_party/pigweed
index 52e02e8..afff1c5 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 52e02e8bbaca9a9696094ee65d2012c79ee9a081
+Subproject commit afff1c568339655e09311861971dc370e6641b0c