roll: pigweed pw_bluetooth_proxy: Fix undefined behavior in DeregisterChannelLocked

Fix dereference of the channels_.end() iterator, which UBSan flagged as
undefined behavior in a downstream project.

This is already covered by tests like
ChannelProxyTest.ChannelsStopOnProxyDestruction, but the UBSan failure
is not triggered until member variables are added to L2capChannelManager
that move the location of channels_ out of 16-byte alignment. The end()
iterator is a list item base class without a L2capChannel subclass, so
dereferencing it tries to downcast to a non-existent subclass.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/331313
Presubmit-Verified: CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com>
Original-Revision: 6b148032eba5cfc22d33a5a953401dbfc276578c

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: d390baa10ed74e..6b148032eba5cf
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8701336086198395281
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ia8c4e1206dbcc9472c3d8ca1a33512c1ee6b9716
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/quickstart/bazel/+/331412
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/MODULE.bazel b/MODULE.bazel
index 349338f..8343898 100644
--- a/MODULE.bazel
+++ b/MODULE.bazel
@@ -41,9 +41,9 @@
 git_override(
     module_name = "pigweed",
     # ROLL: Warning: this entry is automatically updated.
-    # ROLL: Last updated 2025-10-10.
-    # ROLL: By https://cr-buildbucket.appspot.com/build/8701358159245549857.
-    commit = "d390baa10ed74e080a3651cbd93e2b623f70dddf",
+    # ROLL: Last updated 2025-10-11.
+    # ROLL: By https://cr-buildbucket.appspot.com/build/8701336086198395281.
+    commit = "6b148032eba5cfc22d33a5a953401dbfc276578c",
     remote = "https://pigweed.googlesource.com/pigweed/pigweed",
 )