[roll third_party/pigweed] targets/rp2040: Fix pw_assert unit test

Enables floating point support in printf to allow the pw_assert unit
tests to pass.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/154390

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 4a831a0978aed8e..5320887900eccd9
Roller-URL: https://ci.chromium.org/b/8776276814786923601
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I429e703f8aae9802ab2721b6eda813a1114a64ed
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/154194
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/third_party/pigweed b/third_party/pigweed
index 4a831a0..5320887 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 4a831a0978aed8e462f0abdcfc5242048fde9cd1
+Subproject commit 5320887900eccd9adcd145167d334a05c7eeceb4