roll: pigweed pw_kernel: Add more early draft docs

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/297173
Presubmit-Verified: CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com>
Original-Revision: 899c24a93a7a0c411d374f3bd202489428df2036

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: 3f4f714a9366b6..899c24a93a7a0c
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8712204798498992737
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I7ab21a646844975c488a73f39504cc358089865b
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/quickstart/bazel/+/298032
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/MODULE.bazel b/MODULE.bazel
index b6295b0..8ac4149 100644
--- a/MODULE.bazel
+++ b/MODULE.bazel
@@ -40,9 +40,9 @@
 git_override(
     module_name = "pigweed",
     # ROLL: Warning: this entry is automatically updated.
-    # ROLL: Last updated 2025-06-12.
-    # ROLL: By https://cr-buildbucket.appspot.com/build/8712226863962250785.
-    commit = "3f4f714a9366b6aca570d4e2fd20857642a3da40",
+    # ROLL: Last updated 2025-06-13.
+    # ROLL: By https://cr-buildbucket.appspot.com/build/8712204798498992737.
+    commit = "899c24a93a7a0c411d374f3bd202489428df2036",
     remote = "https://pigweed.googlesource.com/pigweed/pigweed",
 )