📝 docs: mention custom Twitter card & automatic OG tags

Related: #353

README.md

@@ -45,6 +45,7 @@ tabi has a perfect score on Google's Lighthouse audit:
 - [X] Support for [comments using giscus, utterances, Hyvor Talk, or Isso](https://welpo.github.io/tabi/blog/comments/).
 - [X] Code syntax highlighting with colours based on [Catppuccin](https://github.com/catppuccin/catppuccin) Frappé.
 - [X] [Local search](https://welpo.github.io/tabi/blog/mastering-tabi-settings/#search) with an accessible, multi-lingual interface.
+- [X] [Custom Twitter card](https://welpo.github.io/tabi/blog/mastering-tabi-settings/#social-media-cards) and automatic Open Graph tags.
 - [X] [KaTeX](https://katex.org/) support for mathematical notation.
 - [X] [Stylized and human readable Atom feed](https://welpo.github.io/tabi/atom.xml).
 - [X] [Stylized and human readable sitemap](https://welpo.github.io/tabi/sitemap.xml).

content/projects/tabi/index.md

@@ -25,6 +25,7 @@ social_media_card = "social_cards/projects_tabi.jpg"
 - Support for [comments using giscus, utterances, Hyvor Talk, or Isso](https://welpo.github.io/tabi/blog/comments/).
 - Code syntax highlighting with colours based on [Catppuccin](https://github.com/catppuccin/catppuccin) Frappé.
 - [Local search](https://welpo.github.io/tabi/blog/mastering-tabi-settings/#search) with an accessible, multi-lingual interface.
+- [Custom Twitter card](https://welpo.github.io/tabi/blog/mastering-tabi-settings/#social-media-cards) and automatic Open Graph tags.
 - [KaTeX](https://katex.org/) support for mathematical notation.
 - [Stylized and human readable Atom feed](https://welpo.github.io/tabi/atom.xml).
 - [Stylized and human readable sitemap](https://welpo.github.io/tabi/sitemap.xml).