use consistent index uid placeholder

Author: guimachiavelli

reference/api/settings.mdx

@@ -1206,7 +1206,7 @@ Update the facet search settings for an index.
 ```json
 {
   "taskUid": 1,
-  "indexUid": "INDEX_NAME",
+  "indexUid": "INDEX_UID",
   "status": "enqueued",
   "type": "settingsUpdate",
   "enqueuedAt": "2024-07-19T22:33:18.523881Z"
@@ -1236,7 +1236,7 @@ Reset an index's facet search to its default settings.
 ```json
 {
   "taskUid": 1,
-  "indexUid": "INDEX_NAME",
+  "indexUid": "INDEX_UID",
   "status": "enqueued",
   "type": "settingsUpdate",
   "enqueuedAt": "2024-07-19T22:35:33.723983Z"
@@ -1305,7 +1305,7 @@ Update the prefix search settings for an index.
 ```json
 {
   "taskUid": 1,
-  "indexUid": "INDEX_NAME",
+  "indexUid": "INDEX_UID",
   "status": "enqueued",
   "type": "settingsUpdate",
   "enqueuedAt": "2024-07-19T22:33:18.523881Z"
@@ -1335,7 +1335,7 @@ Reset an index's prefix search to its default settings.
 ```json
 {
   "taskUid": 1,
-  "indexUid": "INDEX_NAME",
+  "indexUid": "INDEX_UID",
   "status": "enqueued",
   "type": "settingsUpdate",
   "enqueuedAt": "2024-07-19T22:35:33.723983Z"