initRand() has 2 identical entries in docs

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https://nim-lang.org/docs/random.html#initRand%2Cint64

https://nim-lang.org/docs/random.html#initRand%2Cint64_2

the second one can be deleted , it's identical to the first .

this was already reported last year in https://github.com/nim-lang/Nim/issues/23051 and closed as completed , but the committed fixes didn't solve it . the second unnecessary double entry is still there .