add comment and newline to march4.yaml

Author: RutgerVanBeek

march_hardware_builder/robots/march4.yaml

@@ -1,3 +1,4 @@
+# For convenience it is easiest if the joint order is maintained, it is chosen to sort the joints alphabetically.
 march4:
   ifName: enp2s0
   ecatCycleTime: 4
@@ -120,4 +121,4 @@ march4:
             maxPositionIU: 85287
           incrementalEncoder:
             resolution: 12
-            transmission: 101
+            transmission: 101