[third_party/pigweed] Roll 2 commits

6a9cc30b10a4ef8 docs: Require Bazel+GN+CMake for new contributions
cbb157a22f60e27 pw_snapshot: Fix bazel builds

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 0bfe65d4331f9ee..6a9cc30b10a4ef8
Roller-URL: https://ci.chromium.org/b/8749935549055397921
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ia468b85c49007788a143a526fe00019515a1bc8e
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/205791
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 0bfe65d..6a9cc30 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 0bfe65d4331f9ee7ebb9a3bbfadb4aeff7bb4150
+Subproject commit 6a9cc30b10a4ef82a0ff2f85fcc05b1f01e67349