[roll third_party/pigweed] roll: go

From: version:2@1.20.6
To: version:2@1.20.7
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/163287
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 34cff3b4e635b2c..276b0648b8ab177
Roller-URL: https://ci.chromium.org/b/8773420764060607681
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I92cac18fc629ba7a4736abe9e7252adbfb7f2ded
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/163288
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 34cff3b..276b064 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 34cff3b4e635b2c3de548f47c30b365558d4ab67
+Subproject commit 276b0648b8ab17787b2a4d98953b5917adde92bc