Fix typo in RodHanging.txt test input file

Author: RyanDavies19

tests/Mooring/RodHanging.txt

@@ -17,7 +17,7 @@ ID   RodType   Attachment  Xa    Ya    Za    Xb    Yb    Zb   NumSegs RodOutputs
 ID    Type      X       Y       Z       Mass   Volume  CdA    Ca
 (#)   (-)       (m)     (m)     (m)     (kg)   (mˆ3)   (m^2)  (-)
 1     Fixed     -450    0       0       0      0       0      0
-1     Fixed      450    0       0       0      0       0      0
+2     Fixed      450    0       0       0      0       0      0
 ---------------------- LINES ---------------------------------------------------
 ID   LineType   AttachA  AttachB  UnstrLen  NumSegs  LineOutputs
 (#)   (name)     (#)      (#)       (m)       (-)     (-)