doc link auto-parameter-tupling.html doesn't work

[tumakha]

https://github.com/lampepfl/dotty-example-project/blob/2c1e96f4a4a0a7128e4a12690ccfba794b714fe8/src/main/scala/AutoParamTupling.scala#L3

[tumakha]

The correct link is https://dotty.epfl.ch/docs/reference/other-new-features/parameter-untupling.html

[SethTisue]

a PR on this would be very welcome

[liufengyun]

Fixed in #55.