[third_party/pigweed] Roll 2 commits

68ca4ccac262382 pw_bluetooth: Formatting fixes
e3662e8e52d2799 pw_kvs: Make Key an alias for string_view

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 463dca050a46608..68ca4ccac262382
Roller-URL: https://ci.chromium.org/b/8750275480047941105
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I6f6929ab8e19c735dbe29ac1da2f52c740a476f6
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/204631
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 463dca0..68ca4cc 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 463dca050a46608077b3f556b25baaca11b0a48b
+Subproject commit 68ca4ccac2623824abfb663666dd19f102ff37b0