helm: remove hyphens from readme
helm: remove hyphens from readme

Currently this breaks the backup script, and could possibly cause issues elsewhere

mahak/vitess,mattharden/vitess,enisoc/vitess,HubSpot/vitess,mahak/vitess,davygeek/vitess,mattharden/vitess,enisoc/vitess,tirsen/vitess,davygeek/vitess,tinyspeck/vitess,tirsen/vitess,vitessio/vitess,dcadevil/vitess,tinyspeck/vitess,HubSpot/vitess,dcadevil/vitess,vitessio/vitess,mahak/vitess,dcadevil/vitess,tinyspeck/vitess,mattharden/vitess,vitessio/vitess,tirsen/vitess,alainjobart/vitess,dcadevil/vitess,tirsen/vitess,alainjobart/vitess,alainjobart/vitess,alainjobart/vitess,mahak/vitess,enisoc/vitess,dcadevil/vitess,tinyspeck/vitess,dcadevil/vitess,davygeek/vitess,alainjobart/vitess,davygeek/vitess,mattharden/vitess,tinyspeck/vitess,vitessio/vitess,davygeek/vitess,davygeek/vitess,HubSpot/vitess,enisoc/vitess,mahak/vitess,alainjobart/vitess,vitessio/vitess,tirsen/vitess,HubSpot/vitess,tinyspeck/vitess,mattharden/vitess,mattharden/vitess,vitessio/vitess,HubSpot/vitess,davygeek/vitess,tirsen/vitess,enisoc/vitess,dcadevil/vitess,mahak/vitess,mahak/vitess,HubSpot/vitess,tirsen/vitess,mattharden/vitess,HubSpot/vitess,alainjobart/vitess,enisoc/vitess,vitessio/vitess,tirsen/vitess,mattharden/vitess,mahak/vitess,mattharden/vitess,HubSpot/vitess,vitessio/vitess,tirsen/vitess,tinyspeck/vitess,alainjobart/vitess,mattharden/vitess,enisoc/vitess