[roll third_party/pigweed] pw_presubmit: RST format updates

- Replace `.. code::` with Sphinx's `.. code-block::`.
- Replace tabs with spaces. Previously, the script did this but ignored
  the results.
- Don't replace tabs in 'none' or 'go' code blocks.
- Apply RST format updates to existing files.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/204241

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: d01aa29f9f9e113..1e72e7e55cef252
Roller-URL: https://ci.chromium.org/b/8749840591205947105
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I9984c00be1c826b8427164cd44e68b4790a854fb
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/quickstart/bazel/+/206010
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 d01aa29..1e72e7e 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit d01aa29f9f9e113a6b759b73cff0170f56f76002
+Subproject commit 1e72e7e55cef2524d8e64df2a61e2a6e4b87b773