roll: third_party/pigweed 79bd73d..9704b22 (6 commits)

9704b22:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/319993 pw_multibuf: Add docs and examples for v2
c09a24e:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/321173 pw_multibuf: Make conversion constexpr
fb2938f:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/321193 workflows.json: Migrate "kernel" program
c76e0b5:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/320997 pw_env_setup: Add CIPD support for Zephyr SDK
29cc658:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/321021 pw_ide: Integration test compile commands aspect
872ff8b:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/305452 pw_i2c_mcuxpresso: Use non-blocking calls when sending CCC

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: 79bd73d2cce835..9704b2233febad
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8704078228124515265
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I4e03447c8897cf2ac07f12a6d57173a159dbe07d
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/321119
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 79bd73d..9704b22 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 79bd73d2cce8358b4537d768d042d77be5fc9c46
+Subproject commit 9704b2233febad1c06e174ffb47a3eb549d010bf