docs: minor fix in package object doc

[road21]

Package objects are still available in scala 3.2 (and will be available in 3.3), so no need to write versions explicitly.

[WojciechMazur]

You need to sign the CLA before merging this PR. You can find more info here: https://dotty.epfl.ch/docs/contributing/getting-started.html

[som-snytt]

I don't understand why they aren't already deprecated.

Also, when they are deprecated, will this syntax be deprecated, object named package (from an arbitrary test snippet):

package p {
  object `package` {
    def run() = ()
  }
  class C {
    def apply() = run()
  }
}
package q {
  import p.`package`.*
  class D {
    def apply() = run()
  }
  object Thing {
    object `package` {
      def run() = ()
    }
  }
}

[road21]

You need to sign the CLA before merging this PR. You can find more info here: https://dotty.epfl.ch/docs/contributing/getting-started.html

I have signed, but I am unable to rerun pipeline

[nicolasstucki]

I don't understand why they aren't already deprecated.

It is to keep 3.3.0 LTS as compatible as possible with Scala 2. We will start deprecating more things after in 3.4+.