Added Content Type Meta

[ofgrenudo]

While, yes the Content-Type meta will be over written by the server, it is ideal to just have it for the people who dont have their server configured properly. One less thing for them to worry about.

[CaiJimmy]

Hi, thanks for the PR.

However, according to the HTML spec, "A document must not include both a “meta” element with an “http-equiv” attribute whose value is “content-type”, and a “meta” element with a “charset” attribute.", which is the case of this PR.

https://rocketvalidator.com/html-validation/a-document-must-not-include-both-a-meta-element-with-an-http-equiv-attribute-whose-value-is-content-type-and-a-meta-element-with-a-charset-attribute