am bd62289a: am 123bcea2: am c2d4a012: am a5913fbb: am a2f11f81: am caec50ec: docs: changed version 5 to 3 for Billing API

* commit 'bd62289ac30344461e69cb8ee56d2fa3d83ff377':
  docs: changed version 5 to 3 for Billing API