Update README.md

Author: nielsdejong

README.md

@@ -2,7 +2,7 @@
 NeoDash is a lightweight web app to create Neo4j dashboards. 
 Writing Cypher is all that's required to build your first dashboard in minutes. Want to give NeoDash a spin right away? Try it here:  https://nielsdejong.nl/neodash/.
 
-You can also install NeoDash on Neo4j Desktop from the [Graph App Gallery](install.graphapp.io/).
+You can also install NeoDash on Neo4j Desktop from the [Graph App Gallery](https://install.graphapp.io/).
 
 ### Features
 - Live reporting on a Neo4j database with a table, graph view, bar chart or line chart.