Correct grammar for a message to be thrown as part of an exception when the document was not uploaded successfully (part of the 'add' method).

Author: iAMSagar44

vector-stores/spring-ai-azure/src/main/java/org/springframework/ai/vectorstore/azure/AzureVectorStore.java

@@ -233,7 +233,7 @@ public void add(List<Document> documents) {
 
 		for (IndexingResult indexingResult : result.getResults()) {
 			Assert.isTrue(indexingResult.isSucceeded(),
-					String.format("Document with key %s upload is not successfully", indexingResult.getKey()));
+					String.format("Document with key %s did not upload successfully", indexingResult.getKey()));
 		}
 	}