[third_party/pigweed] Roll 2 commits

e97b4de5f89d8c8 pw_{bluetooth_sapphire, env_setup}: Use amd64 SDK
3d1184ac3b600ba docs: Move TODO style guide

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 3f04730295c131b..e97b4de5f89d8c8
Roller-URL: https://ci.chromium.org/b/8752994970573811489
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: If13b2a06b38d5b256d936c7b3e845e2633631212
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/197930
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 3f04730..e97b4de 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 3f04730295c131b950e667ed855b846323bb1370
+Subproject commit e97b4de5f89d8c844d8152f134d6f7692d07e1b2