Re: [PATCH v2] Docs: Fixes link to I2C specification

[Wolfram Sang]

> The additional link is
> not the Wayback Machine link since it seems that the PDF has not been
> archived.

Sure, wikipedia uses this link

https://web.archive.org/web/20210813122132/https://www.nxp.com/docs/en/user-guide/UM10204.pdf

on this page:

https://en.wikipedia.org/wiki/I%C2%B2C

And I agree with Randy about saying "cannot be easily used" in the
commit message.

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