roll: third_party/pigweed pw_tokenizer: Update definition of DetokenizedString::ok()

Previously, C++ DetokenizedString::ok() would return true only if there
were no collisions at all, even if only one collision decoded
successfully. Update DetokenizedString::ok() to return true anytime
there is exactly one successful decode, even if there are multiple
matches. This is consistent with Python.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/289378
Presubmit-Verified: CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com>
Original-Revision: 7273b9029d37be27796d5ff295decf78edf8b238

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: cc9e6dc2c6d717..7273b9029d37be
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8715290928290426593
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ia3497d1a80792aa362fd265810a19952b45c51db
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/290037
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Lint: Lint 🤖 <android-build-ayeaye@system.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 cc9e6dc..7273b90 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit cc9e6dc2c6d7175d15730750723264798920b6ca
+Subproject commit 7273b9029d37be27796d5ff295decf78edf8b238