[third_party/pigweed] Roll 6 commits

517696e29810c51 docs: Mention that Windows flow needs admin rights
849d99bd97a5613 pw_presubmit: Include examples repo docs in docs_b
3f89c18fdffd43f pw_module: Jinja template refactor
6222b1097d11fb1 docs: Update reST style guide
c68babc5337f950 pw_async2: Add Poll::Readiness helper
ef7a6d3ac854bea pw_toolchain: Fix Rust GN host build

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 83816fda4ae0793..517696e29810c51
Roller-URL: https://ci.chromium.org/b/8751507231866865761
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I3f503ca4356cd1777bf9d4ffee0052f25186f48f
Reviewed-on: https://pigweed-review.googlesource.com/c/gonk/+/201916
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 83816fd..517696e 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 83816fda4ae0793d21e79c1ef90e53fe4176ebe4
+Subproject commit 517696e29810c51426a1e6f3438ad7df2580bc74