roll: third_party/pigweed: pw_containers: Add IntrusiveForwardList size report to the docs

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/233651

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 392b2595f13a1a1..df3b7ba1f94902e
Roller-URL: https://ci.chromium.org/b/8737146468578277057
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I67719aea4880699ced4fb97fc7f2de0ca839c2ba
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/234742
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 392b259..df3b7ba 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 392b2595f13a1a1e2ecc3da60bae25e2cc4efaea
+Subproject commit df3b7ba1f94902e81e375ce9935749163c411515