roll: third_party/pigweed pw_transfer: Shrink window size on retried data

http://pwrev.dev/235100 updated transfers to send CONTINUE parameters
instead of RETRANSMIT when a previously-received chunk was retried.
However, as a retry likely indicates an issue with the underlying
network, it is prudent to shrink the window in these cases in an
attempt to reduce congestion.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/249532
Presubmit-Verified: CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com>
Original-Revision: 48712ad0655654b4dcc9b62085a58445fe0af696

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: aeecb42c9905da..48712ad0655654
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8730953303198652513
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I34223a17ed2fbd2daa5529589b0c0de4d87f95e5
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/249718
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 aeecb42..48712ad 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit aeecb42c9905dacca0d0446b5888fee8a738541d
+Subproject commit 48712ad0655654b4dcc9b62085a58445fe0af696