Add documentation for reload_searchIanalyzer api (#1339)

* updated incorrect links

Signed-off-by: ariamarble <armarble@amazon.com>

* add documentation for reload search analyzer api

Signed-off-by: ariamarble <armarble@amazon.com>

* made suggested changes

Signed-off-by: ariamarble <armarble@amazon.com>

* made additional formatting changes

Signed-off-by: ariamarble <armarble@amazon.com>

* made editorial changes

Signed-off-by: ariamarble <armarble@amazon.com>

Signed-off-by: ariamarble <armarble@amazon.com>

_opensearch/rest-api/reload-search-analyzer.md

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+---
+layout: default
+title: Reload search analyzer
+parent: REST API reference
+nav_order: 83
+---
+
+# Reload search analyzer
+
+The reload search analyzer API operation detects any changes to [synonym]({{site.url}}{{site.baseurl}}/opensearch/ux/) files for any configured [search analyzers]({{site.url}}{{site.baseurl}}/im-plugin/refresh-analyzer/index/). The reload search analyzer request needs to be run on all nodes. Additionally, the synonym token filter must be set to `true`.
+
+## Path and HTTP methods
+
+```
+POST /<index>/_reload_search_analyzers
+GET /<index>/_reload_search_analyzers
+```
+
+## Request body fields
+
+Request body parameters are optional.
+
+Field Type | Data Type | Description
+:--- | :--- | :---
+allow_no_indices | Boolean | When set to `false`, an error is returned for indexes that are closed or missing and match any wildcard expression. Default is set to `true`.
+expand_wildcards | String | Allows you to set the wildcards that can be matched to a type of index. Available options are `open`, `closed`, `all`, `none`, and `hidden`. Default is set to `open`.
+ignore_unavailable | Boolean | If an index is closed or missing, an error is returned when ignore_unavailable is set to `false`. Default is set to `false`.
+
+## Examples
+
+The following are an example request and response.
+
+#### Sample request
+
+````json
+POST /shakespeare/_reload_search_analyzers
+````
+ 
+#### Sample response
+
+````json
+{
+  "_shards": {
+    "total": 1,
+    "successful": 1,
+    "failed": 0
+  },
+  "reload_details": [
+    {
+      "index": "shakespeare",
+      "reloaded_analyzers": [
+        "analyzers-synonyms-test"
+      ],
+      "reloaded_node_ids": [
+        "opensearch-node1"
+      ]
+    }
+  ]
+}
+````