Update call-api.md

Author: magrefaat

articles/cognitive-services/language-service/custom-classification/how-to/call-api.md

@@ -156,13 +156,13 @@ First you will need to get your resource key and endpoint
 
 4. After you've installed the client library, use the following samples on GitHub to start calling the API.
 
-    Single category:
+    Single label classification:
     * [C#](https://github.com/Azure/azure-sdk-for-net/blob/main/sdk/textanalytics/Azure.AI.TextAnalytics/tests/samples/Sample10_SingleCategoryClassify.cs)
     * [Java](https://github.com/Azure/azure-sdk-for-java/blob/main/sdk/textanalytics/azure-ai-textanalytics/src/samples/java/com/azure/ai/textanalytics/lro/ClassifyDocumentSingleCategory.java)
     * [JavaScript](https://github.com/Azure/azure-sdk-for-js/blob/main/sdk/textanalytics/ai-text-analytics/samples/v5/javascript/customText.js)
     * [Python](https://github.com/Azure/azure-sdk-for-python/blob/main/sdk/textanalytics/azure-ai-textanalytics/samples/sample_single_category_classify.py)
 
-    Multiple category:
+    Multiple label classification:
     * [C#](https://github.com/Azure/azure-sdk-for-net/blob/main/sdk/textanalytics/Azure.AI.TextAnalytics/tests/samples/Sample11_MultiCategoryClassify.cs)
     * [Java](https://github.com/Azure/azure-sdk-for-java/blob/main/sdk/textanalytics/azure-ai-textanalytics/src/samples/java/com/azure/ai/textanalytics/lro/ClassifyDocumentMultiCategory.java)
     * [JavaScript](https://github.com/Azure/azure-sdk-for-js/blob/main/sdk/textanalytics/ai-text-analytics/samples/v5/javascript/customText.js)