fix style

Author: mr-zepol

src/main/java/org/cyclonedx/model/ExternalReference.java

@@ -114,8 +114,8 @@ public enum Type {
         EVIDENCE("evidence"),
         @JsonProperty("formulation")
         FORMULATION("formulation"),
-        @JsonProperty( "rfc-9116")
-        RFC_9116( "rfc-9116"),
+        @JsonProperty("rfc-9116")
+        RFC_9116("rfc-9116"),
         @JsonProperty("other")
         OTHER("other");