Refer to the issue template for adding an MCP server (#137)

Author: rdimitrov

docs/toolhive/how-to/registry.md

@@ -176,9 +176,10 @@ This restores the default behavior of using ToolHive's built-in registry.
 ## Contribute to the registry
 
 If you have an MCP server that you'd like to add to the ToolHive registry, you
-can [open an issue](https://github.com/stacklok/toolhive/issues) or submit a
-pull request to the ToolHive GitHub repository. The ToolHive team will review
-your submission and consider adding it to the registry.
+can
+[open an issue](https://github.com/stacklok/toolhive/issues/new?template=add-an-mcp-server.md)
+or submit a pull request to the ToolHive GitHub repository. The ToolHive team
+will review your submission and consider adding it to the registry.
 
 Criteria for adding an MCP server to the ToolHive registry are outlined in
 [Registry criteria](../concepts/registry-criteria.md). These criteria ensure