Add qualification

Author: kgryte

lib/node_modules/@stdlib/utils/if-else-async/docs/repl.txt

@@ -12,8 +12,8 @@
     - error: error object
     - bool: condition used to determine whether to invoke `x` or `y`
 
-    The `done` callback is invoked upon function completion and is provided two
-    arguments:
+    The `done` callback is invoked upon function completion and is provided at
+    most two arguments:
 
     - error: error object
     - result: either `x` or `y`