[roll third_party/pigweed] pw_bluetooth_proxy: Removing trailing comma in PW_LOG call

Original-Bug: 326499611
Test: CQ
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/209231
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 84853afa7c9be8e..e6d8fb860af22d8
Roller-URL: https://ci.chromium.org/b/8748469502413690017
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I52a07637e2e54612706227c103279b1822108c28
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/quickstart/bazel/+/209074
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Lint: Lint 🤖 <android-build-ayeaye@system.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 84853af..e6d8fb8 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 84853afa7c9be8ee981c247fbad161e86a7afbd3
+Subproject commit e6d8fb860af22d8ace7447d1e6c3aaf89c68da29