[roll pigweed] pw_containers: Fix IntrusiveList docs

The docs previously stated that an IntrusiveList item could not
go out of scope while its corresponding list was still extant.
This is incorrect, as the item will remove itself from the list.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/104774

https://pigweed.googlesource.com/pigweed/pigweed
pigweed Rolled-Commits: cf68738b20508da..cc08ad371fa8b99
Roller-URL: https://ci.chromium.org/b/8806807355853576961
Cq-Cl-Tag: roller-builder:pigweed-zephyr-roller
Cq-Cl-Tag: roller-bid:8806807355853576961
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I8a8a566d33320592a7b4ac3e8b2a4d4044fefecf
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/zephyr-integration/+/104870
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/pigweed b/pigweed
index cf68738..cc08ad3 160000
--- a/pigweed
+++ b/pigweed
@@ -1 +1 @@
-Subproject commit cf68738b20508da3f4d973afb243eb17fd9ef969
+Subproject commit cc08ad371fa8b99323c4bb48a93bb4cd233186b2