Add lfs subcategory to API section of enterprise-admin (github#20762)

* Add Git LFS API section to enterprise-admin

* Add GHES version constraint

* >= 3.3

* Try `> 3.2`

Co-authored-by: hubwriter <hubwriter@github.com>

Co-authored-by: Emma Makinson <emmaviolet@github.com>
Co-authored-by: hubwriter <hubwriter@github.com>

Author: 3 people

content/rest/reference/enterprise-admin.md

@@ -195,6 +195,16 @@ $ curl -L 'https://api_key:<em>your-amazing-password</em>@<em>hostname</em>:<em>
 
 {% endif %}
 
+{% ifversion ghes > 3.2 %}
+
+## Git LFS
+
+{% for operation in currentRestOperations %}
+  {% if operation.subcategory == 'lfs' %}{% include rest_operation %}{% endif %}
+{% endfor %}
+
+{% endif %}
+
 {% ifversion ghae or ghes %}
 ## Organizations