[third_party/pigweed] Roll 4 commits

3e8bef930da69af nanopb: Fix nanopb_pb2.py generation
6d7b236a2fe4be1 pw_web: Fix logs not appearing in pw_console serve
273fa7962c10e83 pw_bluetooth: Emboss formatting tweak
b8c700540dbb7c0 pw_bluetooth: Add cmake to usage guide

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 16ca90925a98bdc..3e8bef930da69af
Roller-URL: https://ci.chromium.org/b/8752201761153357121
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I0c4f90757691a3590aca95a1bd38662f577b691f
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/200897
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 16ca909..3e8bef9 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 16ca90925a98bdcbe294618973adff00e2649853
+Subproject commit 3e8bef930da69af11405e92b8df86d1fa6f7e6a7