fix README.md typo (#6469)
fix README.md typo (#6469)


square/okhttp,yschimke/okhttp,yschimke/okhttp,ze-pequeno/okhttp,ansman/okhttp,ansman/okhttp,square/okhttp,ze-pequeno/okhttp,tiarebalbi/okhttp,ze-pequeno/okhttp,tiarebalbi/okhttp,yschimke/okhttp,square/okhttp,tiarebalbi/okhttp,ansman/okhttp,cmzy/okhttp,cmzy/okhttp