Removed trailing comma (#122430) (#122792)

When this example was copy/pasted onto the console it was throwing a 'Bad string' error on the editor

Co-authored-by: fdipilla <[email protected]>

Author: kosabogi

docs/reference/search/search-your-data/semantic-text-hybrid-search

@@ -24,7 +24,7 @@ PUT semantic-embeddings
   "mappings": {
     "properties": {
       "semantic_text": { <1>
-        "type": "semantic_text", 
+        "type": "semantic_text"
       },
       "content": { <2>
         "type": "text",