99% invisible share page not rendering correctly

[keunes]

Short description: When tapping 'share' in AntennaPod from the '99% invisible' podcast, the 'Subscribe' page (based on the created URL) doesn't render correctly: It doesn't include the Podcast's title & the field that should display the RSS feed says 'JavaScript required'.

URL: https://antennapod.org/deeplink/subscribe/?url=https%3A%2F%2Ffeeds.simplecast.com%2FBqbsxVfO&title=99%25+Invisible

More info: Introduced in #303 & AntennaPod/AntennaPod#6835. It seems that the problem is the percentage sign in the title - if it is removed the page renders correctly.

Inspector points here: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Malformed_URI?utm_source=mozilla&utm_medium=firefox-console-errors&utm_campaign=default

CC: @ByteHamster