Editing HeaderWarning list

{{Quality}}
HeaderWarnings are useful ways of indicating various helpful bits of information to the user, like if a page is outdated or constantly changing. 
== [[Template:Outdated]] ==
Shows to the user that the information in the article or section may be outdated. The template also shows the latest version for reference.
==== Preview ====
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{{Outdated}}
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== [[Template:Dynamic]] ==
Shows to the user that the topic of the article or section is "dynamic," meaning it changes frequently.
==== Preview ====
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{{Dynamic}}
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== [[Template:Spoiler]] ==
Shows to the user that the topic of the article or section may contain spoilers for Isotopeia, one of matthy.dev's games.
==== Preview ====
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{{Spoiler}}
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== [[Template:Stub]] ==
Shows that the article or section is welcome to be expanded upon, and is quite brief or unhelpful in its current state.
==== Preview ====
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{{Stub}}
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== [[Template:HeaderWarning]] ==
HeaderWarning is the base template used to show a big warning sign for use cases shown before.
For ordered arguments:

# The header of the warning, e.g. "Spoiler"
# The description of the warning, e.g. "This section or article contains spoilers."

For optional (but also positional) arguments:

* <b>border</b>: The color of the border of the warning, usually in hexadecimal (by default, <code>#5a5a5a</code>) or CSS's notations.
* <b>bg</b>: The color of the background of the warning, usually in hexadecimal (by default, <code>#cacaca</code>) or CSS's notations.
* <b>header</b>: The color of the warning's header, usually in hexadecimal (by default, <code>#4a4a4a</code>) or CSS's notations.
* <b>fg</b>: The color of the description text/foreground, usually in hexadecimal or CSS's notations.