update usage docs

src/site/markdown/usage.md

@@ -27,17 +27,10 @@ The following advanced script tag attributes are supported:
 * `nonce` = {string}
 * `referrerpolicy` = no-referrer | no-referrer-when-downgrade | origin | origin-when-cross-origin | same-origin | strict-origin | strict-origin-when-cross-origin | unsafe-url
 * `type` = module | text/javascript
+* `customAttributes` - set arbitrary HTML attributes, e.g. `customAttributes=['attr1=value 1','data-attr2=5','attr3']`
 
 See https://developer.mozilla.org/en-US/docs/Web/HTML/Element/script#Attributes for a full documentation of this attributes.
 
-It is possible to set a list of custom attributes:
-
-```html
-<sly data-sly-use.clientlib="/apps/wcm-io/wcm/ui/clientlibs/sightly/templates/clientlib.html"
-    data-sly-call="${clientlib.js @ categories=['my-clientlib-category'],
-    customAttributes=['attr1=value 1','data-attr2=5','attr3']}"/>
-```
-
 
 ### Include CSS Files
 
@@ -51,14 +44,4 @@ Include CSS without special attributes:
 The following advanced link tag attributes are supported:
 
 * `rel` = prefetch | preload (if not given, `rel="stylesheet" type="text/css"` is set)
-
-
-### Custom Attributes
-
-It is possible to set a list of custom attributes:
-
-```html
-<sly data-sly-use.clientlib="/apps/wcm-io/wcm/ui/clientlibs/sightly/templates/clientlib.html"
-    data-sly-call="${clientlib.css @ categories=['my-clientlib-category'],
-    customAttributes=['attr1=value 1','data-attr2=5','attr3']}"/>
-```
+* `customAttributes` - set arbitrary HTML attributes, e.g. `customAttributes=['attr1=value 1','data-attr2=5','attr3']`