[DOCS] Removes // from start trained model deployment link (#2534)

Changes `{ref}//start-trained-model-deployment.html` to `{ref}/start-trained-model-deployment.html`

Author: KOTungseth

docs/en/stack/ml/nlp/ml-nlp-apis.asciidoc

@@ -21,8 +21,8 @@ All the trained models endpoints have the following base:
 // INFER
 * {ref}/infer-trained-model.html[Infer trained model]
 // START
-* {ref}//start-trained-model-deployment.html[Start trained model deployment]
+* {ref}/start-trained-model-deployment.html[Start trained model deployment]
 // STOP
 * {ref}/stop-trained-model-deployment.html[Stop trained model deployment]
 // UPDATE
-* {ref}/put-trained-models-aliases.html[Update trained model aliases]
+* {ref}/put-trained-models-aliases.html[Update trained model aliases]