update urls

Author: Montana Low

README.md

@@ -42,11 +42,11 @@
     Train and deploy models to make online predictions using only SQL, with an open source extension for Postgres. Manage your projects and visualize datasets using the built in dashboard.
 </p>
 
-![PostgresML in practice](pgml-docs/docs/images/console.png){align="center"}
+![PostgresML in practice](pgml-docs/docs/images/console.png)
 
 The dashboard makes it easy to compare different algorithms or hyperparaters across models and datasets.
 
-[![PostgresML dashboard](pgml-docs/docs/images/models.png)](https://demo.postgresml.org/){align="center"}
+[![PostgresML dashboard](pgml-docs/docs/images/models.png)](https://demo.postgresml.org/)
 
 <h2 align="center">
     See it in action — <a href="https://demo.postgresml.org/" target="_blank">demo.postgresml.org</a>
@@ -112,4 +112,4 @@ pgml_development=# SELECT pgml.version();
 (1 row)
 ```
 
-See the documentation for a complete guide to **[working with PostgresML]()**.
+See the documentation for a complete guide to **[working with PostgresML](https://postgresml.org/)**.