[1013][cuygnus][mkdocs.yml] Add backends catalogue
[1013][cuygnus][mkdocs.yml] Add backends catalogue

Fiware/context.Cygnus,Fiware/data.Cygnus,Fiware/context.Cygnus,telefonicaid/fiware-cygnus,Fiware/context.Cygnus,telefonicaid/fiware-cygnus,Fiware/context.Cygnus,telefonicaid/fiware-cygnus,telefonicaid/fiware-cygnus,Fiware/data.Cygnus,Fiware/data.Cygnus