[DOCS] _cat/shards: clarify required permissions for restricted ind…

…ices (elastic#115650) (elastic#115804)

Clarify security requirements when requesting detailed shard information
for restricted indices.

(cherry picked from commit 023c856)

docs/reference/cat/shards.asciidoc

@@ -30,7 +30,7 @@ For data streams, the API returns information about the stream's backing indices
 * If the {es} {security-features} are enabled, you must have the `monitor` or
 `manage` <<privileges-list-cluster,cluster privilege>> to use this API.
 You must also have the `monitor` or `manage` <<privileges-list-indices,index privilege>>
-for any data stream, index, or alias you retrieve.
+to view the full information for any data stream, index, or alias you retrieve.
 
 [[cat-shards-path-params]]
 ==== {api-path-parms-title}