We no longer use `std::shuffle` to implement random test order, so
a debug mode bug in old versions of libstdc++ cannot apply to us.

Co-authored-by: Martin Hořeňovský <martin.horenovsky@gmail.com>

Thanks to the new distributions, this is almost trivial change.

specialiation -> specialization

The original link is no longer available but a fork is still on GitHub.

Did this, because with 3.0.1, the files
- catch_xmlwriter.cpp
- catch_string_manip.hpp
- catch_test_case_info.hpp

were missing

This led to some obvious and some obscure compile errors when compiling
with g++ 13.2.0 (std c++17 or c++20)
One of these errors being "Elaborated-type-specifier for a scoped enum
must not use the ‘class’ keyword"

Since this is a rather bad experience and debugging it is
time-consuming, I suggest to simply boost the recommended version in the
snippet which is likely copied by new Catch2 users

The existing formatting created one-element lists separated by paragraphs, when it would make more sense to have the paragraphs that are providing more information about one of those list entries be part of the list entry itself.

I think this makes the documentation easier to read in both markdown and html form, and should also improve the structure for assistive technologies.