Fix errors

While the wrong party is presumably my error, the statement of persons
nominated (and the official results) now has the candidate's forename as
"Nick". Very unlikely that I would have transcribed this as "Nicolas" in
the first instance, so I presume the SOPN has been amended thus.

bodies/sutton-council/2022-05-05/sutton-west-and-east-cheam.yaml

@@ -17,8 +17,8 @@ candidates:
     elected: 
   -
     surname: Carter
-    forenames: Nicolas
-    party: Liberal Democrats
+    forenames: Nick
+    party: Labour Party
     votes: 552
     elected: 
     flag: yes