[roll third_party/pigweed] pw_software_update: Add credit to TUF spec

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/58201

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 0a58c02465f6763..f5eba290689dbf3
Roller-URL: https://ci.chromium.org/b/8837622602050687521
Cq-Cl-Tag: roller-builder:pigweed-sample-project-roller
Cq-Cl-Tag: roller-bid:8837622602050687521
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I01a8f72d2f4d809eebd9ce45d9e01d60db800c4f
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/sample_project/+/58900
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 0a58c02..f5eba29 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 0a58c02465f6763dbd319176b6aeb5606bcce699
+Subproject commit f5eba290689dbf3e4c0d4a0836926ffa629427f4