Reverted change to enums in southbound.proto, see comment

proto/gosdn/southbound/southbound.proto

-syntax = "proto3";
-
-package gosdn.southbound;
-
-import "google/protobuf/descriptor.proto";
-
-option go_package = "code.fbi.h-da.de/danet/api/go/gosdn/southbound";
-
-
-message SouthboundInterface {
-  string id = 1;
-  Type type = 2;
-}
-
-enum Type {
-  UNSPECIFIED = 0;
-  OPENCONFIG = 1;
-  CONTAINERISED = 2;
-  PLUGIN = 3;
-}
+syntax = "proto3";
+
+package gosdn.southbound;
+
+import "google/protobuf/descriptor.proto";
+
+option go_package = "code.fbi.h-da.de/danet/api/go/gosdn/southbound";
+
+
+message SouthboundInterface {
+  string id = 1;
+  Type type = 2;
+}
+
+// Changed accoprding to style guide: 
+// https://docs.buf.build/best-practices/style-guide#enums
+enum Type {
+  TYPE_UNSPECIFIED = 0;
+  TYPE_OPENCONFIG = 1;
+  TYPE_CONTAINERISED = 2;
+  TYPE_PLUGIN = 3;
+}