doc: Fix link to open issues on GitHub.

Author: 0b10011

doc/api/vm.markdown

@@ -13,8 +13,8 @@ JavaScript code can be compiled and run immediately or compiled, saved, and run
 ## Caveats
 
 The `vm` module has many known issues and edge cases. If you run into
-issues or unexpected behavior, please consult
-[the open issues on GitHub](https://github.com/joyent/node/issues/search?q=vm).
+issues or unexpected behavior, please consult [the open issues on
+GitHub](https://github.com/joyent/node/search?q=vm+state%3Aopen&type=Issues).
 Some of the biggest problems are described below.
 
 ### Sandboxes