[chore] set entities link title #2460 (#2462)

Author: thompson-tomo

docs/registry/entities/README.md

@@ -1,5 +1,5 @@
 <!--- Hugo front matter used to generate the website version of this page:
-auto_gen: below
+linkTitle: Entities
 --->
 
 <!-- NOTE: THIS FILE IS AUTOGENERATED. DO NOT EDIT BY HAND. -->

templates/registry/markdown/entity_readme.md.j2

@@ -1,6 +1,6 @@
 {%- import 'stability.j2' as stability -%}
 <!--- Hugo front matter used to generate the website version of this page:
-auto_gen: below
+linkTitle: Entities
 --->
 
 <!-- NOTE: THIS FILE IS AUTOGENERATED. DO NOT EDIT BY HAND. -->