[roll third_party/pigweed] build: Remove docs from default build on Arm Macs

The docs target uses doxygen which is not in CIPD for Arm Macs.

Original-Bug: b/315998985
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/192754

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 47fb4b3f1fd0a60..e7814b76f3ebcc3
Roller-URL: https://ci.chromium.org/b/8756002798926524353
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ie3130391d5d180cfdfa6c8ea269947bc3a364bb0
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/192774
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 47fb4b3..e7814b7 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 47fb4b3f1fd0a60e41b327c88f79eba7b9b45bd8
+Subproject commit e7814b76f3ebcc3fcb095b59ec855c925e38585a