net-p2p/readarr: Update to 0.3.15.2376

ChangeLog: https://github.com/Readarr/Readarr/releases/tag/v0.3.16.2387

 * Fixed: Replacing 'appName' translation token
 * Check Content-Type in FileList parser
 * Sort Custom Filters
 * Improved http timeout handling
 * Multiple Translations updated by Weblate
 * Fixed: Cutoff unmet showing Unmonitored books
 * Fixed: Wanted Missing showing Unmonitored books
 * Bump version to 0.3.16

PR:		276538
Reported by:	michiel@vanbaak.eu (maintainer)