Minor documentation fixes
Minor documentation fixes

- Update varint support status
- Fix formatting of set type

physikerwelt/restbase,physikerwelt/restbase,wikimedia/hyperswitch,Krenair/restbase,milimetric/restbase,inverno/restbase,d00rman/restbase,gwicke/restbase,gwicke/restbase,d00rman/restbase,wikimedia/restbase,hardikj/restbase,inverno/restbase,hardikj/restbase,Pchelolo/restbase,eevans/restbase,cscott/restbase,Pchelolo/restbase,wikimedia/restbase,milimetric/restbase,wikimedia/mediawiki-services-restbase,cscott/restbase,eevans/restbase,wikimedia/mediawiki-services-restbase,Krenair/restbase