Update newsblur to v13.11.4

See https://github.com/samuelclay/NewsBlur/tags -> https://github.com/samuelclay/NewsBlur/releases/tag/Android_13.11.4, version 13.11.4 is available since 2025-12-04, the version in f-droid at https://f-droid.org/packages/com.newsblur/ is at version 13.8.0. Would be great to have a more current version available, thanks for consideration!