Fix typo in comment

src/bin/pg_basebackup/pg_recvlogical.c

@@ -853,7 +853,7 @@ main(int argc, char **argv)
 
 	/*
 	 * Obtain a connection to server. This is not really necessary but it
-	 * helps to get more precise error messages about authentification,
+	 * helps to get more precise error messages about authentication,
 	 * required GUC parameters and such.
 	 */
 	conn = GetConnection();