[roll third_party/pigweed] pw_crypto: Rename sha256::Digest() to sha256::Hash()

Renames the function name sha256::Digest() to sha256::Hash() since
"digest" is more commonly used to denote the output of hashing.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/53780

third_party/pigweed Rolled-Commits: 442e487808ff2c6..2c44c22c241ea11
Roller-URL: https://ci.chromium.org/b/8840218631541605601
Cq-Cl-Tag: roller-builder:pigweed-experimental-roller
Cq-Cl-Tag: roller-bid:8840218631541605601
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: If7f891cc0d1ec0e4e782e97ffbed257d243ce166
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/55365
Reviewed-by: 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 442e487..2c44c22 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 442e487808ff2c63501da30a6022ffd5fd6a2b0a
+Subproject commit 2c44c22c241ea116acaf745d5cd92da6a7113f4d