Fix changelog markdown formatting.
Fix changelog markdown formatting.

The 10 in Android 10 was interpretted as a list item.

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