Update Scala CLI Template (backport #3757) (#3759)

* Update Scala CLI Template (#3757)

* Use "dep" instead of deprecated "lib"
* Add _root_ to `import circt.stage.ChiselStage`
  * Also add comment describing how this disambiguates from
    chisel3.util.circt when the user does `import chisel3.util._`
* Bump versions in Github workflows

(cherry picked from commit 589f1067

)

# Conflicts:
#	.github/workflows/build-scala-cli-template.yml
#	.github/workflows/build-scala-cli-template/chisel-template.scala

* Resolve backport conflicts

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Co-authored-by: Jack Koenig <koenig@sifive.com>