Update dart to beta 2.19.0-444.3.beta

library/dart

@@ -1,12 +1,12 @@
 Maintainers: Alexander Thomas <[email protected]> (@athomas), Tony Pujals <[email protected]> (@subfuzion)
 GitRepo: https://github.com/dart-lang/dart-docker.git
 GitFetch: refs/heads/main
-GitCommit: cd5a05005c231cad63791a3a6d7368228ce7925d
+GitCommit: 819f5bcf17877205ac492b7dfeb7f92ddf87a8be
 
 Tags: 2.18.6-sdk, 2.18-sdk, 2-sdk, stable-sdk, sdk, 2.18.6, 2.18, 2, stable, latest
 Architectures: amd64, arm32v7, arm64v8
 Directory: stable/bullseye
 
-Tags: 2.19.0-444.2.beta-sdk, beta-sdk, 2.19.0-444.2.beta, beta
+Tags: 2.19.0-444.3.beta-sdk, beta-sdk, 2.19.0-444.3.beta, beta
 Architectures: amd64, arm32v7, arm64v8
 Directory: beta/bullseye