Update facade docblocks

Author: taylorotwell

src/Illuminate/Support/Facades/Context.php

@@ -20,7 +20,9 @@
  * @method static \Illuminate\Log\Context\Repository addIf(string $key, mixed $value)
  * @method static \Illuminate\Log\Context\Repository addHiddenIf(string $key, mixed $value)
  * @method static \Illuminate\Log\Context\Repository push(string $key, mixed ...$values)
+ * @method static mixed pop(string $key)
  * @method static \Illuminate\Log\Context\Repository pushHidden(string $key, mixed ...$values)
+ * @method static mixed popHidden(string $key)
  * @method static bool stackContains(string $key, mixed $value, bool $strict = false)
  * @method static bool hiddenStackContains(string $key, mixed $value, bool $strict = false)
  * @method static bool isEmpty()