docs/reference/config: move bs configuration
docs/reference/config: move bs configuration

It was in the middle of the registry configuration.

Related to #1136.

4eek/tsuru,gwmoura/tsuru,mderaldo/tsuru,guilhermebr/tsuru,ggarnier/tsuru,Endika/tsuru,firebitsbr/tsuru,kgrvamsi/tsuru,gwmoura/tsuru,gciotta/tsuru,ArxdSilva/tsuru,cgvarela/tsuru,ggarnier/tsuru,RichardKnop/tsuru,guilhermebr/tsuru,firebitsbr/tsuru,tsuru/tsuru,ArxdSilva/tsuru,tsuru/tsuru,cezarsa/tsuru,gwmoura/tsuru,ggarnier/tsuru,Endika/tsuru,4eek/tsuru,gciotta/tsuru,tuxmonteiro/tsuru,guilhermebr/tsuru,firebitsbr/tsuru,tuxmonteiro/tsuru,hcxiong/tsuru,tuxmonteiro/tsuru,RichardKnop/tsuru,ArxdSilva/tsuru,mderaldo/tsuru,4eek/tsuru,cezarsa/tsuru,RichardKnop/tsuru,kgrvamsi/tsuru,cgvarela/tsuru,hcxiong/tsuru,guilhermebr/tsuru,tsuru/tsuru,cezarsa/tsuru,tsuru/tsuru,Endika/tsuru,hcxiong/tsuru,mderaldo/tsuru,cezarsa/tsuru,kgrvamsi/tsuru,gciotta/tsuru,ggarnier/tsuru,ArxdSilva/tsuru,cgvarela/tsuru