Fix: Snapshot Publishing

[jhayes2-chwy]

Use a local variable version instead of overwriting project.version

This was tested locally before and after using a throw-away version dump task e.g.:

tasks.register("checkVersion") {
    doLast {
      println(project.version as String)
  }
}

Fixes: #14169

[jhayes2-chwy]

Without the val, this was being interpreted as an assignment to project.version, rather than as a local variable declaration/initialization.

[laurit]

thanks