Update content/en/docs/reference/using-api/declarative-validation.md

Co-authored-by: Tim Bannister <[email protected]>

Author: aaron-prindle

content/en/docs/reference/using-api/declarative-validation.md

@@ -99,7 +99,7 @@ This document provides a comprehensive reference for all available declarative v
 
 ## Tag Reference
 
-### `+k8s:eachKey`
+### `+k8s:eachKey` {#tag-eachKey}
 
 **Description:**