Update docs/specification/1.0.md

thanks, Brett!

Co-Authored-By: isaacvetter <[email protected]>

Author: brettmarquard

docs/specification/1.0.md

@@ -50,7 +50,7 @@ Each CDS Service SHALL be described by the following attributes.
 
 Field | Optionality | Type | Description
 ----- | ----- | ----- | ---------
-`hook`| REQUIRED | *string* | The hook this service should be invoked on. See [Hooks](#Hooks).
+`hook`| REQUIRED | *string* | The hook this service should be invoked on. See [Hooks](#hooks).
 `title`| RECOMMENDED | *string* | The human-friendly name of this service.
 <nobr>`description`</nobr>| REQUIRED | *string* | The description of this service.
 `id` | REQUIRED | *string* | The {id} portion of the URL to this service which is available at<br />`{baseUrl}/cds-services/{id}`