fix: use of .sort() in Podcast templates

[stephiescastle]

Checklist

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Description

Fixes the following error on Podcast episode and season pages:

500 Cannot assign to read only property '0' of object '[object Array]'

Instructions to test

Tested in the following environments/browsers:

Operating System

• macOS
• iOS
• iPadOS
• Windows

Browser

• Chrome
• Firefox ESR
• Firefox
• Safari
• Edge