Fix 2.5.3 upgrade instructions
Fix 2.5.3 upgrade instructions

nyimbi/cartodb,nyimbi/cartodb,future-analytics/cartodb,UCL-ShippingGroup/cartodb-1,raquel-ucl/cartodb,nyimbi/cartodb,future-analytics/cartodb,DigitalCoder/cartodb,bloomberg/cartodb,DigitalCoder/cartodb,CartoDB/cartodb,dbirchak/cartodb,splashblot/dronedb,thorncp/cartodb,dbirchak/cartodb,codeandtheory/cartodb,UCL-ShippingGroup/cartodb-1,codeandtheory/cartodb,bloomberg/cartodb,splashblot/dronedb,thorncp/cartodb,codeandtheory/cartodb,nuxcode/cartodb,thorncp/cartodb,UCL-ShippingGroup/cartodb-1,nyimbi/cartodb,future-analytics/cartodb,DigitalCoder/cartodb,CartoDB/cartodb,codeandtheory/cartodb,raquel-ucl/cartodb,bloomberg/cartodb,codeandtheory/cartodb,nuxcode/cartodb,thorncp/cartodb,nuxcode/cartodb,splashblot/dronedb,dbirchak/cartodb,dbirchak/cartodb,thorncp/cartodb,nyimbi/cartodb,raquel-ucl/cartodb,bloomberg/cartodb,CartoDB/cartodb,CartoDB/cartodb,CartoDB/cartodb,UCL-ShippingGroup/cartodb-1,dbirchak/cartodb,nuxcode/cartodb,DigitalCoder/cartodb,raquel-ucl/cartodb,nuxcode/cartodb,bloomberg/cartodb,splashblot/dronedb,future-analytics/cartodb,UCL-ShippingGroup/cartodb-1,future-analytics/cartodb,DigitalCoder/cartodb,splashblot/dronedb,raquel-ucl/cartodb