roll: third_party/pigweed 5a5a2d7..466384b (5 commits)

466384b:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/276792 pw_toolchain: Remove llvm_toolchain_macos
c64aca0:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/275174 pw_elf: Fix conversion warnings in reader_impl
1ee626d:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/276732 build: Add .vscode/ to .bazelignore
892b65c:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/276453 pw_rpc_transport: Remove unused header
2dba9b7:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/276733 MODULE.bazel: Tweak qemu reference

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: 5a5a2d74128dca..466384b3a70347
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8720030658669202849
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I9c690c92767cc458b2d13468a24bc163f36ff37e
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/276912
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Bot-Commit: 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 5a5a2d7..466384b 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 5a5a2d74128dcac1e6cf0ef8827d973d89bdc85b
+Subproject commit 466384b3a70347a158fa5cc3f6f113e137f1bd8e