Bump index page versions links

Author: andreslucena

docs/en/modules/ROOT/pages/index.adoc

@@ -10,7 +10,7 @@ You’ve found the documentation for Decidim. Learn about the project at https:/
 
 [NOTE]
 ====
-This is the documentation for the `develop` branch. You can see this same documentation site for other versions: xref:v0.29@ROOT:index.adoc[v0.29], xref:v0.28@ROOT:index.adoc[v0.28] and xref:v0.27@ROOT:index.adoc[v0.27]
+This is the documentation for the `develop` branch. You can see this same documentation site for other versions: xref:v0.30@ROOT:index.adoc[v0.30], xref:v0.29@ROOT:index.adoc[v0.29], xref:v0.28@ROOT:index.adoc[v0.28] and xref:v0.27@ROOT:index.adoc[v0.27]
 ====
 
 // * Read the xref:ROOT:getting-started.adoc[Getting Started guide]