Update protobuf-java to 3.19.4

[scala-steward]

Updates com.google.protobuf:protobuf-java from 3.19.3 to 3.19.4.
GitHub Release Notes - Version Diff

I'll automatically update this PR to resolve conflicts as long as you don't change it yourself.

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Files still referring to the old version number

The following files still refer to the old version number (3.19.3).
You might want to review and update them manually.

maven-plugin/src/main/maven/plugin.xml

Ignore future updates

Add this to your .scala-steward.conf file to ignore future updates of this dependency:

updates.ignore = [ { groupId = "com.google.protobuf", artifactId = "protobuf-java" } ]

labels: library-update, early-semver-patch, semver-spec-patch, old-version-remains, commit-count:1