[roll third_party/pigweed] pw_tokenizer: Combine duplicated docs sections

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/168865

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 155b55c593ad161..7533632f4b372d9
Roller-URL: https://ci.chromium.org/b/8771325618622148977
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I6d0207b2c3ae895a5203ca3b8ffc5058ac58c807
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/169050
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 155b55c..7533632 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 155b55c593ad161118a15b357c4fd56fa0d50147
+Subproject commit 7533632f4b372d9cb7b80d356ba4e1a2772a71e1