[roll third_party/pigweed] pw_tokenizer: Optional tokenization without args

Allows optionally tokenized fields in protos to be detokenized even if
they're missing arguments.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/80840

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 1f9e355813e139d..0a2c9d787a5b5ca
Roller-URL: https://ci.chromium.org/b/8824397483250539713
Cq-Cl-Tag: roller-builder:pigweed-experimental-roller
Cq-Cl-Tag: roller-bid:8824397483250539713
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: If30adceb6427e3440d9586e84dea91626f3f0d83
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/80826
Bot-Commit: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
Commit-Queue: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 1f9e355..0a2c9d7 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 1f9e355813e139d651e773fd24d163ffd90fb128
+Subproject commit 0a2c9d787a5b5caec8e7dc36894c3a55d3d95a0b