Update facade docblocks

Author: taylorotwell

src/Illuminate/Support/Facades/RateLimiter.php

@@ -8,6 +8,7 @@
  * @method static mixed attempt(string $key, int $maxAttempts, \Closure $callback, int $decaySeconds = 60)
  * @method static bool tooManyAttempts(string $key, int $maxAttempts)
  * @method static int hit(string $key, int $decaySeconds = 60)
+ * @method static int increment(string $key, int $decaySeconds = 60, int $amount = 1)
  * @method static mixed attempts(string $key)
  * @method static mixed resetAttempts(string $key)
  * @method static int remaining(string $key, int $maxAttempts)