Update sbt-scalafmt to 2.0.6

[scala-steward]

Updates org.scalameta:sbt-scalafmt from 2.0.5 to 2.0.6.

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 me 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 #3090 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #3090   +/-   ##
=======================================
  Coverage   93.49%   93.49%           
=======================================
  Files         368      368           
  Lines        6979     6979           
  Branches      184      184           
=======================================
  Hits         6525     6525           
  Misses        454      454

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