[docs] Correction for documentation reference

[Julien Palard]

Hi Michael,

> Technically, the term camelCase (without other decoration) does not begin with a capitalized letter since it now looks like a camel with a hump in the middle. Given the potential for ambiguity there are two distinctions which more clearly identify what happens with the first character: UpperCamelCase and lowerCamelCase.

I opened a pull request [1], feel free to proofread it.

[1]: https://github.com/python/cpython/pull/14644/files
-- 
Julien Palard
https://mdk.fr