Clarify documentation for IAccessManager.canCall (#5795)

contracts/access/manager/IAccessManager.sol

@@ -97,7 +97,7 @@ interface IAccessManager {
      * previously set delay (not zero), then the function should return false and the caller should schedule the operation
      * for future execution.
      *
-     * If `immediate` is true, the delay can be disregarded and the operation can be immediately executed, otherwise
+     * If `allowed` is true, the delay can be disregarded and the operation can be immediately executed, otherwise
      * the operation can be executed if and only if delay is greater than 0.
      *
      * NOTE: The IAuthority interface does not include the `uint32` delay. This is an extension of that interface that