[third_party/pigweed] Roll 2 commits

3f89c18fdffd43f pw_module: Jinja template refactor
6222b1097d11fb1 docs: Update reST style guide

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: c68babc5337f950..3f89c18fdffd43f
Roller-URL: https://ci.chromium.org/b/8751551988647479361
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I244858fe3da7f20729ff6d1442094f84b36c3285
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/quickstart/bazel/+/201974
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 c68babc..3f89c18 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit c68babc5337f95069917288028bbc3bc978b8a14
+Subproject commit 3f89c18fdffd43f6838307fa5fa8c9900c7b4071