ARSN-422: update max post field length error

Author: Will Toozs

lib/errors/arsenalErrors.ts

@@ -281,10 +281,10 @@ export const MaxMessageLengthExceeded: ErrorFormat = {
     description: 'Your request was too big.',
 };
 
-export const MaxPostPreDataLengthExceededError: ErrorFormat = {
+export const MaxPostPreDataLengthExceeded: ErrorFormat = {
     code: 400,
     description:
-        'Your POST request fields preceding the upload file were too large.',
+        'Your POST request fields preceeding the upload file was too large.',
 };
 
 export const MetadataTooLarge: ErrorFormat = {