Reference pages need a descriptive `og:title` property

[SableRaf]

Right now the Open Graph title property of every Reference page is set as property="og:title" content="Reference".

This leads to unhelpful previews when reference pages are shared on other sites like the Processing forum for example:

[SableRaf]

[Update for @runemadsen]

The og:title property on each reference page should be Reference: {{name of the function/variable/class}}

Right now it looks like <meta data-react-helmet="true" property="og:title" content="Reference">

It should be like <meta data-react-helmet="true" property="og:title" content="Reference: frameCount">

For example:

• Reference: textFont()
• Reference: lerpColor()
• Reference: frameCount