docs: acl options should be hyphenated not underscored (#109)
docs: acl options should be hyphenated not underscored (#109)

---
- public_read -> public-read
- public_read_write -> public-read-write
- authenticated_read -> authenticated-read
joshdholtz/fastlane-plugin-s3,joshdholtz/fastlane-plugin-s3,joshdholtz/fastlane-plugin-s3,joshdholtz/fastlane-plugin-s3,joshdholtz/fastlane-plugin-s3