[roll third_party/pigweed] pw_digital_io: move type trait definition

Specialization `internal::Requires<class DigitalInterrupt>` was defined
in `pw_digital_io.h` instead of `internal/conversions.h`. This was
missed when moving specializations in the original change.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/98660

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: be1b751a77e9af1..dca0050abe79b85
Roller-URL: https://ci.chromium.org/b/8810714214055471777
Cq-Cl-Tag: roller-builder:pigweed-experimental-roller
Cq-Cl-Tag: roller-bid:8810714214055471777
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I9f9c7cf36d322d740166882b29a9d00e77f81d1a
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/99260
Commit-Queue: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
Bot-Commit: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index be1b751..dca0050 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit be1b751a77e9af16e02025649ad1a703258d244f
+Subproject commit dca0050abe79b85b5bbce45b0b6c3815b241bb59