Update documentation

.github/readme/partials/introduction.md

@@ -1,5 +1,9 @@
 Generate your metrics that you can embed everywhere, including your GitHub profile readme! It works for both user and organization accounts, and even for repositories!
 
+<% if (/[.]0-beta$/.test(packaged.version)) { %>
+<sup>*⚠️ This is the documentation of **v<%= packaged.version.replace(/[.]0-beta$/, "") %>-beta** (`@master` branch) which includes [unreleased features](https://github.com/lowlighter/metrics/compare/latest...master), see documentation of **v<%= (Number(packaged.version.replace(/[.]0-beta$/, ""))-0.1).toFixed(1) %>** (`@latest` branch) [here](https://github.com/lowlighter/metrics/blob/latest/README.md).*</sup>
+<% } %>
+
 <table>
   <tr>
     <th align="center">For user accounts</th>
@@ -13,6 +17,9 @@ Generate your metrics that you can embed everywhere, including your GitHub profi
   let cell = 0
   const elements = Object.entries(plugins).filter(([key, value]) => (value)&&(!["base", "core"].includes(key)))
 %>
+
+And you can customize these heavily with plugins, templates and hundreds of options!
+
 <table>
   <tr>
     <th colspan="2" align="center">