[llvm][docs] Update Kaleidoscope Wikipedia link

[thunder-coding]

The older link was pointing to the Kaleidoscope which is a tube of mirrors containing colorful objects. The link should be to the Kaleidoscope programming language.

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[MacDue]

I don't think the tutorial is related to the "Kaleidoscope programming language" on Wikipedia. I think this is just showing what the name of the toy language is derived from.