nit(mu4e): neutralize comments

Some of our comments/docs can come off as disparaging or snide. They're
glimpses of unfiltered frustration or snarky rubber ducking gone too
far, something I can totally sympathize with, as a scatterbrained
tinkerer, unwittingly made responsible for a lot of work that isn't mine
because of Doom's position as a middleman. But now that Doom has a
veritable userbase, I'd like to hold it to a higher standard.

Light-hearted banter and aired grievances in our source code,
documentation, or community are fine if focused on the problem or the
personal/shared experiences of the community (things that offer value or
amusement to others), but it is never acceptable to attack people or
their efforts. Especially not the very people on whose shoulders Doom
stands.

I sincerely apologize if these have offended you.

Amend: b07614037f

modules/lang/php/README.org

@@ -16,13 +16,10 @@ This module adds support for PHP 5.3+ (including PHP7) to Doom Emacs.
 - [[https://github.com/hlissner/doom-snippets/tree/master/php-mode][Snippets]]
 
 #+begin_quote
- 💡 PHP was the first programming language I got paid to code in, back in the
+ 💬 PHP was the first programming language I got paid to code in, back in the
     Cretaceous period (2003). My sincerest apologies go out to all the
     programmers who inherited my earliest PHP work. I know you're out there,
     writhing in your straitjackets.
-
-    Save a programmer today. Stop a friend from choosing PHP as their first
-    language.
 #+end_quote
 
 ** Maintainers