Update scalafmt-core to 3.1.1

[scala-steward]

Updates org.scalameta:scalafmt-core from 3.1.0 to 3.1.1.
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.

Configure Scala Steward for your repository with a .scala-steward.conf file.

Have a fantastic day writing Scala!

Files still referring to the old version number

The following files still refer to the old version number (3.1.0).
You might want to review and update them manually.

modules/core/src/main/resources/scalafix-migrations.conf
modules/core/src/test/scala/org/scalasteward/core/data/VersionTest.scala
modules/core/src/test/scala/org/scalasteward/core/update/FilterAlgTest.scala
modules/core/src/test/scala/org/scalasteward/core/update/PruningAlgTest.scala
project/Dependencies.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 = "scalafmt-core" } ]

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

[codecov]

Codecov Report

Merging #2347 (86b9b01) into master (9cf8839) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2347   +/-   ##
=======================================
  Coverage   80.25%   80.25%           
=======================================
  Files         138      138           
  Lines        2391     2391           
  Branches       60       60           
=======================================
  Hits         1919     1919           
  Misses        472      472           

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