[roll third_party/pigweed] pw_console: Upgrade prompt_toolkit and ptpython

New versions support mouse drag events.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/68741

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: eba238f4d548a7e..6a6bf1bfd30de47
Roller-URL: https://ci.chromium.org/b/8830449843541571793
Cq-Cl-Tag: roller-builder:pigweed-sample-project-roller
Cq-Cl-Tag: roller-bid:8830449843541571793
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I7773accbac364bf9a4407cdc8624895916e06efc
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/sample_project/+/69160
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 eba238f..6a6bf1b 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit eba238f4d548a7ee770973182922b93ff0a4e88c
+Subproject commit 6a6bf1bfd30de4710289a9e74bc2ca2d14eaefe3