[roll third_party/pigweed] pw_presubmit: Upload coverage json to zoss

Original-Bug: b/279161371
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/162090

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: a6e8fe16ff79e9b..4d6620db1bce984
Roller-URL: https://ci.chromium.org/b/8773764441693983137
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I0d1c8701e0957a7d14cf06319550240c96a5b9d5
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/162832
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 a6e8fe1..4d6620d 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit a6e8fe16ff79e9bc214ab6f01ea1b9277bb4d9ea
+Subproject commit 4d6620db1bce9847fbadf0761ee98f8e9e8edf41