Update how-to-migrate.md

removed en-us locale

Author: melghazali

articles/cognitive-services/Translator/custom-translator/how-to-migrate.md

@@ -23,7 +23,7 @@ These actions are performed during migration:
 * At any point, the BLEU score migrated from the Hub training can be found in the TrainingDetails page of the model in the “Bleu score in MT Hub” heading.
 
 > [!Note] 
-> For a training to succeed, Custom Translator requires a minimum of 10,000 unique extracted sentences. Custom Translator can't conduct a training with fewer than the [suggested minimum](https://docs.microsoft.com/en-us/azure/cognitive-services/translator/custom-translator/sentence-alignment#suggested-minimum-number-of-sentences).
+> For a training to succeed, Custom Translator requires a minimum of 10,000 unique extracted sentences. Custom Translator can't conduct a training with fewer than the [suggested minimum](https://docs.microsoft.com/azure/cognitive-services/translator/custom-translator/sentence-alignment#suggested-minimum-number-of-sentences).
 
 ## Find Custom Translator Workspace ID