fix: add missing enum value (#166)

Author: shaljam

src/main/java/io/getstream/chat/java/models/Channel.java

@@ -142,10 +142,12 @@ public static class ChannelMember {
     public enum InviteStatus {
       @JsonProperty("pending")
       PENDING,
-      @JsonProperty("accepted")
-      ACCEPTED,
+      @JsonProperty("member")
+      MEMBER,
       @JsonProperty("rejected")
       REJECTED,
+      @JsonProperty("accepted")
+      ACCEPTED,
       @JsonEnumDefaultValue
       UNKNOWN
     }