Update sbt-sonatype to 3.9.4

[scala-steward]

Updates org.xerial.sbt:sbt-sonatype from 3.9.3 to 3.9.4.
GitHub Release Notes - 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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Ignore future updates

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

updates.ignore = [ { groupId = "org.xerial.sbt", artifactId = "sbt-sonatype" } ]

labels: sbt-plugin-update, semver-patch

[codecov-commenter]

Codecov Report

Merging #3507 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #3507   +/-   ##
=======================================
  Coverage   91.75%   91.75%           
=======================================
  Files         383      383           
  Lines        8406     8406           
  Branches      212      232   +20     
=======================================
  Hits         7713     7713           
  Misses        693      693