chore: Adding SSM Layer Arn Instructions to Docs (#2486)

* adding ssm layer arn instructions

* docs formatting

Author: malachi-constant

docs/source/_static/ssm_public_parameters.png

@@ -79,6 +79,28 @@ For example: ``arn:aws:lambda:us-east-1:336392948345:layer:AWSSDKPandas-Python38
 
 The full list of ARNs is available `here <layers.rst>`__.
 
+Layer ARNs can also be obtained from SSM public parameters.
+
+**Console:**
+
+.. image:: _static/ssm_public_parameters.png
+  :alt: SSM Public Parameters
+
+**CLI:**
+Find all layers for a version of the library within a region.
+
+.. code-block:: sh
+
+    aws ssm describe-parameters --parameter-filters "Key=Name, Option=BeginsWith, Values=/aws/service/aws-sdk-pandas/3.4.0/us-west-2/"
+
+**CDK:**
+
+.. code-block:: python
+
+    sdk_for_pandas_layer_arn = ssm.StringParameter.from_string_parameter_attributes(self, "MyValue",
+      parameter_name="/aws/service/aws-sdk-pandas/3.4.0/us-west-2/py3.10/x86_64/layer-arn"
+    ).string_value
+
 Custom Layer
 ^^^^^^^^^^^^^^