Remove references to deprecated python versions in alexa documentation (#39785)

source/_integrations/alexa.intent.markdown

@@ -65,7 +65,7 @@ Next you need to create a Lambda function.
   - **US West (Oregon)** region for Japanese and English (AU) skills.
 - Click `Functions` in the left navigation bar, display list of your Lambda functions.
 - Click `Create function`, select `Author from scratch`, then input a `Function name`.
-- Select *Python 3.* as `Runtime` (Python 3.9 was available at this time).
+- Select *Python 3.* as `Runtime`.
 - Select *Use an existing role* as `Execution role`, then select the role you just created from the `Existing role` list.
 - Click `Create function`, then you can configure the details of the Lambda function.
 - Under the `Configuration` tab, expand `Designer`, then click on `+ Add trigger` in the left part of the panel and select `Alexa Skills Kit` from the dropdown list to add an Alexa Skills Kit trigger to your Lambda function.

source/_integrations/alexa.smart_home.markdown

@@ -157,7 +157,7 @@ Next you need create a Lambda function.
 
 - Click `Functions` in the left navigation bar, to display the list of your Lambda functions.
 - Click `Create function`, select `Author from scratch`, then input a `Function name`.
-- Select *Python 3.9*, *Python 3.8* or *Python 3.7* as `Runtime`.
+- Select *Python 3.* as `Runtime`.
 - Expand the `Change default execution role` dropdown and make sure to select *Use an existing role* as `Execution role`, then select the role you just created from `Existing role` list.
 - Click `Create function`, then you can configure the details of Lambda function.
 - Expand the `Function overview` (if it isn't already expanded), then click `+ Add trigger` in the left part of the panel, then click `Alexa Smart Home` from the drop down list to add an Alexa Smart Home trigger to your Lambda function.