roll: third_party/pigweed doxygen: Show only the home and modules tabs

By default, Doxygen lets you browse an API in many different
ways. E.g. you can browse by namespace, class, struct, etc.
For now, we should disable all these alternative navigation
schemas and make sure that each API item is correctly listed
under the Pigweed module where that API item is exposed. At
a later date we can re-enable the alternative organization
schemas if a need arises.

Original-Bug: 426012010
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/311320
Presubmit-Verified: CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com>
Original-Revision: 2b23689560196ea206283712f65093f3d48ab148

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: 9b9b629a122fd9..2b23689560196e
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8707129574391557729
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Id45d0271790e333b4621e0d2f4fe82b0a8da9888
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/311278
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Commit-Queue: 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 9b9b629..2b23689 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 9b9b629a122fd9ea9ce26c1819f7eed811fa8b60
+Subproject commit 2b23689560196ea206283712f65093f3d48ab148