RS: Add dry_run option for Redis ACL REST API to reference & 7.8.4 release notes (#1011)

* DOC-4685 RS: Add dry_run option to redis_acl REST API reference

* DOC-4685 DOC-4629 RS: Add dry_run option for redis_acl REST API to 7.8.4 release notes

Author: rrelledge

content/operate/rs/references/rest-api/requests/redis_acls/_index.md

@@ -183,6 +183,17 @@ PUT /redis_acls/17
 | Host | cnm.cluster.fqdn | Domain name |
 | Accept | application/json | Accepted media type |
 
+#### Query parameters
+
+| Field   | Type | Description |
+|---------|------|---------------|
+| dry_run |  | Validate the updated [Redis ACL object]({{< relref "/operate/rs/references/rest-api/objects/redis_acl" >}}) but don't apply the update. |
+
+#### URL parameters
+
+| Field | Type | Description |
+|-------|------|-------------|
+| uid | integer | The Redis ACL's unique ID. |
 
 #### Request body
 
@@ -258,6 +269,11 @@ POST /redis_acls
 | Host | cnm.cluster.fqdn | Domain name |
 | Accept | application/json | Accepted media type |
 
+#### Query parameters
+
+| Field   | Type | Description |
+|---------|------|---------------|
+| dry_run |  | Validate the new [Redis ACL object]({{< relref "/operate/rs/references/rest-api/objects/redis_acl" >}}) but don't apply the update. |
 
 #### Request body
 

content/operate/rs/release-notes/rs-7-8-releases/rs-7-8-4-18.md

@@ -6,7 +6,7 @@ categories:
 - operate
 - rs
 compatibleOSSVersion: Redis 7.4.0
-description: Certificate-based authentication for the REST API.
+description: Certificate-based authentication for the REST API. Dry run option to validate Redis ACL REST API requests.
 linkTitle: 7.8.4-18 (December 2024)
 weight: 88
 aliases: /operate/rs/release-notes/rs-7-8-releases/rs-7-8-4-tba/
@@ -20,6 +20,8 @@ This version offers:
 
 - Certificate-based authentication for the REST API
 
+- Dry run option to validate Redis ACL REST API requests
+
 ## New in this release
 
 ### New features
@@ -74,6 +76,22 @@ This version offers:
 
         - Certificate-based authentication is not implemented for the Cluster Manager UI.
 
+### Enhancements
+
+- If you create or update a Redis ACL using the REST API, you can use the `dry_run` query parameter to validate the request without actually applying the update.
+
+    - [Create Redis ACL]({{<relref "/operate/rs/references/rest-api/requests/redis_acls#post-redis_acl">}}) example request:
+
+        ```sh
+        POST /v1/redis_acls?dry_run
+        ```
+
+    - [Update Redis ACL]({{<relref "/operate/rs/references/rest-api/requests/redis_acls#put-redis_acl">}}) example request: 
+
+        ```sh
+        PUT /v1/redis_acls/<uid>?dry_run
+        ```
+
 ### Redis database versions
 
 Redis Software version 7.8.4 includes three Redis database versions: 7.4, 7.2, and 6.2.