Update sbt-scalafix to 0.9.16

[scala-steward]

Updates ch.epfl.scala:sbt-scalafix from 0.9.15-3 to 0.9.16.
GitHub Release Notes - Version Diff

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.

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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 = "ch.epfl.scala", artifactId = "sbt-scalafix" } ]

labels: sbt-plugin-update, semver-pre-release

[codecov-commenter]

Codecov Report

Merging #3437 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #3437   +/-   ##
=======================================
  Coverage   91.64%   91.64%           
=======================================
  Files         381      381           
  Lines        8268     8268           
  Branches      225      225           
=======================================
  Hits         7577     7577           
  Misses        691      691           

Flag	Coverage Δ
#scala_version_212	91.63% <ø> (ø)
#scala_version_213	91.43% <ø> (ø)

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