Updated documentation of celery with SQS support (#4382)

* Updated documentation to show installation of celery with SQS support as discussed on issue 4362
https://github.com/celery/celery/issues/4362

* Updated documentation to show installation of celery with SQS support as discussed on issue 4362
https://github.com/celery/celery/issues/4362

* Typo

docs/getting-started/brokers/sqs.rst

@@ -9,12 +9,13 @@
 Installation
 ============
 
-For the Amazon SQS support you have to install the :pypi:`boto`
-library using :command:`pip`:
+For the Amazon SQS support you have to install additional dependencies.
+You can install both Celery and these dependencies in one go using
+the ``celery[sqs]`` :ref:`bundle <bundles>`:
 
 .. code-block:: console
 
-    $ pip install -U boto3
+    $ pip install celery[sqs]
 
 .. _broker-sqs-configuration: