Bump ttrss gnusocial plugin commit

src/freedombone

 RSS_MOBILE_READER_COMMIT='d5242e1c269e9480ab3b66b7a38da3c892dfb326'
 RSS_READER_PATH=/etc/share/tt-rss
 RSS_READER_GNUSOCIAL_REPO="https://github.com/bashrc/ttrss-gnusocial"
-RSS_READER_GNUSOCIAL_COMMIT='8b92b8f5db7b0d12459c7bd86a50f48815efe642'
+RSS_READER_GNUSOCIAL_COMMIT='20b2535e3f2b0ddc0117b584bdcaa6bf7a2d9fa2'
 
 # refresh gpg keys every few hours
 REFRESH_GPG_KEYS_HOURS=2