docs: Don't use "lame" in documentation

[danieldiekmeier]

I noticed that the docs for the new class features use cool/lame as an example. The usage of the word "lame" feels a bit unnecessary in this case and some people (including me) consider it ableist. For example, Merriam-Webster say:

Lame is no longer applied to people in medical contexts, and the disparaging uses, as in "a lame excuse," "he's so lame," "a lame party," and "lame jokes," are occasionally considered to be offensive as well.

(via https://www.merriam-webster.com/dictionary/lame)

My suggestion is to replace the wanted contrast with cool/boring and be done with it. I also quickly checked for other ableist words in examples but couldn't find any. (There were two "dumb"s in code comments, and I changed them as well, but they are not user-facing.)

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[Conduitry]

In a tremendous coincidence, "lame" and "dumb" are two of the words that this PR brings to mind.

[danieldiekmeier]

Oh, okay. Sorry.

[danieldiekmeier]

I’m really surprised by this comment, this is not what I expected. It’s okay that you don’t like the PR, but I feel this comment does not meet the code of conduct at all. Sorry for wasting your time on this, I‘m definitely sorry I wasted my own.