updated invitation link

Author: kpodemski

content/slack/_index.md

@@ -14,7 +14,7 @@ aliases:
 
 The project's Slack chat is open to anyone who wants to discuss, help and contribute to the PrestaShop open source project. If you are an active contributor, or want to become one, this is definitely the place to be!
 
-<a class="cta cta-dark cta--pattern" style="margin: 2rem auto" href="https://join.slack.com/t/prestashop/shared_invite/zt-2f9o67wg6-DgsDM2tT8vZvHjyIK614lQ"><span class="mb-0">Request an invitation for PrestaShop's Slack chat</span></a>
+<a class="cta cta-dark cta--pattern" style="margin: 2rem auto" href="https://join.slack.com/t/prestashop/shared_invite/zt-39z2e9nxy-gWqH1fww~lx65~AwLjBaeQ"><span class="mb-0">Request an invitation for PrestaShop's Slack chat</span></a>
 {.text-center}
 
 ## Ground rules & good practices