ALternative name for API Key credentials - encoded

Author: mnocon

docs/search/search_engines/elasticsearch/configure_elasticsearch.md

@@ -232,14 +232,14 @@ ibexa_elasticsearch:
                 credentials: ['ui2lp2axTNmsyakw9tvNnw', 'VuaCfGcBCdbkQm-e5aOx']
 ```
 
-Alternatively, pass the API key credentials:
+Alternatively, pass the encoded API key value (Elasticsearch also calls it "API key credentials"):
 
 ``` yaml
 <connection_name>:
     # ...
     authentication:
         type: api_key
-        credentials: ['<api_key_credentials>']
+        credentials: ['<api_key_encoded>']
 ```
 
 For example:
@@ -255,7 +255,7 @@ ibexa_elasticsearch:
                 credentials: ['VnVhQ2ZHY0JDZGJrUW0tZTVhT3g6dWkybHAyYXhUTm1zeWFrdzl0dk5udw==']
 ```
 
-Refer to the [examples in Elasticsearch documentation](https://www.elastic.co/guide/en/elasticsearch/reference/8.19/security-api-create-api-key.html#security-api-create-api-key-example) to see the difference between API key, API key id and API key credentials.
+Refer to the [examples in Elasticsearch documentation](https://www.elastic.co/guide/en/elasticsearch/reference/8.19/security-api-create-api-key.html#security-api-create-api-key-example) to see the difference between API key, API key id and encoded API key.
 
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