[roll third_party/pigweed] pw_build: Upgrade mypy

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/57821

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: f9cc04145c3baef..75e038f0d852b31
Roller-URL: https://ci.chromium.org/b/8838341103639068848
Cq-Cl-Tag: roller-builder:pigweed-experimental-roller
Cq-Cl-Tag: roller-bid:8838341103639068848
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I768f472cab247bb7be6579c392bf80e194d55b04
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/57844
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/third_party/pigweed b/third_party/pigweed
index f9cc041..75e038f 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit f9cc04145c3baefecc22cbb382842640a6a9b189
+Subproject commit 75e038f0d852b310d135b93061bc769cb8bf90c4