chore: link governance docs in README

Author: bfabio

README.md

@@ -1,12 +1,40 @@
-# The `publiccode.yml` standard
-
-[![GitHub release](https://img.shields.io/github/release/publiccodeyml/publiccode.yml.svg?style=plastic)](https://github.com/publiccodeyml/publiccode.yml/releases)
-[![Join the #publiccode channel](https://img.shields.io/badge/Slack%20channel-%23publiccode-blue.svg)](https://developersitalia.slack.com/messages/CAM3F785T)
-[![Get invited](https://slack.developers.italia.it/badge.svg)](https://slack.developers.italia.it/)
-
-> A metadata description standard for public software that is easy to use both for
-> developers and people with less technical background, in order to make the
-> software developed by Public Administrations and Public Organisations easily discoverable.
+<!-- markdownlint-disable no-inline-html -->
+
+<h1 align="center">The `publiccode.yml` standard</h1>
+
+<div align="center">
+  <i>
+    A metadata description standard for public software that is easy to use both for
+    developers and people with less technical background in order to make the
+    software developed by Public Administrations and Public Organisations easily discoverable.
+  </i>
+</div>
+
+<br />
+
+ <!-- Badges -->
+<div align="center">
+  <a href="https://github.com/publiccodeyml/publiccode.yml/releases">
+    <img alt="Latest release" src="https://img.shields.io/github/release/publiccodeyml/publiccode.yml.svg?style=plastic">
+  </a>
+  <a href="https://developersitalia.slack.com/messages/CAM3F785T">
+    <img alt="Join the #publiccode channel" src="https://img.shields.io/badge/Slack%20channel-%23publiccode-blue.svg">
+  </a>
+  <a href="https://slack.developers.italia.it/">
+    <img alt="Get invited" src="https://slack.developers.italia.it/badge.svg">
+  </a>
+</div>
+
+<div align="center">
+  <h3>
+    <a href="governance/charter.md">Charter</a>
+    <span> | </span>
+    <a href="governance/procedure-proposing-changes-and-voting.md">
+      Voting procedure</a>
+    <span> | </span>
+    <a href="CONTRIBUTING.md">Contributing</a>
+  </h3>
+</div>
 
 ## What this file is for