Fixed some typos in errors

ref #76

src/errors/PrincipalErrors.ts

@@ -13,12 +13,12 @@ export class PrincipalNotFoundError extends NotFoundError {
 }
 
 /**
- * Error to throw, when a provided runnerOrganisation doesn't belong to the accepted types.
+ * Error to throw, when a provided runner organization doesn't belong to the accepted types.
  */
 export class PrincipalWrongTypeError extends NotAcceptableError {
 	@IsString()
 	name = "PrincipalWrongTypeError"
 
 	@IsString()
-	message = "The princial must have an existing principal's id. \n You provided a object of another type."
+	message = "The principal must have an existing principal's id. \n You provided a object of another type."
 }