Adding Podfriend to the list of apps supporting the Transcript tag

docs/element-support.md

@@ -7,7 +7,7 @@ For elements that are included in the official [DTD](https://github.com/Podcasti
 ## Transcript `<podcast:transcript>`
 1. [Buzzsprout](https://www.buzzsprout.com/blog/transcription-tools)
 2. [Podcast Addict](https://podcastaddict.com/changelog/2020_14#section1)
-3.
+3. [Podfriend](https://www.podfriend.com/)
 
 ## Locked `<podcast:locked>`
 1.