[third_party/pigweed] Roll 2 commits

8d915ae182f1a1f docs: Update module docs contributor guidelines
682ac383f108edd emboss: Update emboss repo to tag v2024.0419.15560

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: b21f1b705dbf644..8d915ae182f1a1f
Roller-URL: https://ci.chromium.org/b/8749901557532205713
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ie3ee619c6c4c7061de699cfcf82b6ff6004cf503
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/205856
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index b21f1b7..8d915ae 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit b21f1b705dbf644d0d97817705a3231304f21fbc
+Subproject commit 8d915ae182f1a1ffa1b1308c051b5229976d890b