[roll third_party/pigweed] docs: Doxygenify pw::interrupt::InInterruptContext()

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/146594

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 4064c5bd76b8c1c..8dba6eb8388caf9
Roller-URL: https://ci.chromium.org/b/8780083901600536705
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ie3e605858688a6269b32875ce092f7b4fea7ee8a
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/149015
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 4064c5b..8dba6eb 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 4064c5bd76b8c1cb340f38132fc3675b661af005
+Subproject commit 8dba6eb8388caf9cf76007e6a432c408a76d4dc2