Update sbt-scalafmt to 2.0.4

[scala-steward]

Updates org.scalameta:sbt-scalafmt from 2.0.3 to 2.0.4.

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

If you'd like to skip this version, you can just close this PR. If you have any feedback, just mention @scala-steward in the comments below.

Have a fantastic day writing Scala!

Ignore future updates

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

updates.ignore = [ { groupId = "org.scalameta", artifactId = "sbt-scalafmt" } ]

labels: semver-patch

[codecov-io]

Codecov Report

Merging #3014 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #3014   +/-   ##
=======================================
  Coverage   93.56%   93.56%           
=======================================
  Files         368      368           
  Lines        6949     6949           
  Branches      195      195           
=======================================
  Hits         6502     6502           
  Misses        447      447

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