docker: Roll tag to 4f51ac76335b107

From: us.gcr.io/google.com/pigweed/environment:0564aa3f3c43f8da63b858e9fa04e3be84e73bd0
To: us.gcr.io/google.com/pigweed/environment:4f51ac76335b1079ebca8246e35adc90141a6fbf

CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ic701975f751609cfa94df1858516adf47a280d0b
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/17102
Reviewed-by: Pigweed Roller <pigweed-roller@pigweed.google.com.iam.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed.google.com.iam.gserviceaccount.com>
diff --git a/docker/tag b/docker/tag
index 621eeb5..18d3b57 100644
--- a/docker/tag
+++ b/docker/tag
@@ -1 +1 @@
-us.gcr.io/google.com/pigweed/environment:0564aa3f3c43f8da63b858e9fa04e3be84e73bd0
\ No newline at end of file
+us.gcr.io/google.com/pigweed/environment:4f51ac76335b1079ebca8246e35adc90141a6fbf
\ No newline at end of file