feat: set python 3.8 as default hosted skill python runtime version (#283)

Author: skrotha

media/createSkill/createSkill.html

@@ -86,7 +86,7 @@ <h1>Create new skill</h1>
                             <span>With Alexa-Hosted skills you get free hosting with AWS Lambda (up to the AWS Free Tier). <a href='https://developer.amazon.com/en-US/docs/alexa/hosted-skills/build-a-skill-end-to-end-using-an-alexa-hosted-skill.html'>Learn more</a></span>
                             <select id="runtime" name="runtime">
                                 <option value='NODE_16_X'>Alexa-Hosted (Node.js)</option>
-                                <option value='PYTHON_3_7'>Alexa-Hosted (Python)</option>
+                                <option value='PYTHON_3_8'>Alexa-Hosted (Python)</option>
                             </select>
                             <br/><br/>
                             <label for="skillRegion">Hosting region</label><br/>