fixup! Add stubs for standard library

Fix UNKNOWN

Author: kocsismate

ext/standard/basic_functions.stub.php

@@ -1193,7 +1193,7 @@ function stream_context_get_params($context): array {}
  * @param array|string $param2
  * @param mixed $value
  */
-function stream_context_set_option($context, $param2, string $option_name = UNKNOWN, $value = UNKNWOWN): bool {}
+function stream_context_set_option($context, $param2, string $option_name = UNKNOWN, $value = UNKNOWN): bool {}
 
 /** @param resource $stream_or_context */
 function stream_context_get_options($stream_or_context): array {}