[formrecognizer] Update Sample README with links to spans samples (Azure#21864)

* update readme with spans samples

* update samples description

Author: catalinaperalta

sdk/formrecognizer/azure-ai-formrecognizer/samples/README.md

@@ -40,6 +40,7 @@ All of these samples need the endpoint to your Form Recognizer resource ([instru
 |[sample_get_operations.py][sample_get_operations] and [sample_get_operations_async.py][sample_get_operations_async]|Get and list the document model operations created within the past 24 hours|
 |[sample_copy_model.py][sample_copy] and [sample_copy_model_async.py][sample_copy_async]|Copy a custom model from one Form Recognizer resource to another|
 |[sample_get_words_on_document_line.py][sample_get_words_on_document_line] and [sample_get_words_on_document_line_async.py][sample_get_words_on_document_line_async]|Get the words in a DocumentLine|
+|[sample_get_elements_with_spans.py][sample_get_elements_with_spans] and [sample_get_elements_with_spans_async.py][sample_get_elements_with_spans_async]|Get elements, such as words, lines, and styles, in the result of an analyze operation by searching with spans|
 
 ## Samples for client library versions 3.1.X
 
@@ -138,6 +139,9 @@ what you can do with the Azure Form Recognizer client library.
 [sample_copy_async]: https://github.com/Azure/azure-sdk-for-python/blob/main/sdk/formrecognizer/azure-ai-formrecognizer/samples/v3.2-beta/async_samples/sample_copy_model_async.py
 [sample_get_words_on_document_line]: https://github.com/Azure/azure-sdk-for-python/blob/main/sdk/formrecognizer/azure-ai-formrecognizer/samples/v3.2-beta/sample_get_words_on_document_line.py
 [sample_get_words_on_document_line_async]: https://github.com/Azure/azure-sdk-for-python/blob/main/sdk/formrecognizer/azure-ai-formrecognizer/samples/v3.2-beta/async_samples/sample_get_words_on_document_line_async.py
+[sample_get_elements_with_spans]: https://aka.ms/azsdk/python/formrecognizer/spansamplesync
+[sample_get_elements_with_spans_async]: https://aka.ms/azsdk/python/formrecognizer/spansampleasync
+
 
 <!-- V3.1 links -->
 [sample_authentication]: https://github.com/Azure/azure-sdk-for-python/tree/main/sdk/formrecognizer/azure-ai-formrecognizer/samples/v3.1/sample_authentication.py