Update STYLE-GUIDE.md (#337)
Update STYLE-GUIDE.md (#337)

Fixed a typo.
istio/api,rshriram/api,geeknoid/api,geeknoid/api,cloudfoundry-attic/api,istio/api,rshriram/api,istio/api,geeknoid/api,istio/api,geeknoid/api,rshriram/api,cloudfoundry-attic/api,cloudfoundry-attic/api,cloudfoundry-attic/api,cloudfoundry-attic/api