Fix a typo

Author: zeenix

src/vision/status_quo/alan_tries_to_debug_a_hang.md

@@ -130,7 +130,7 @@ Disgruntled, Alan begins the arduous, boring task of instrumenting the applicati
 * Some of the characters with either a background in Rust or a background in systems programming might know that Rust's async doesn't always map to an underlying system feature and so they might expect that `gdb` or `lldb` is unable to help them.
 * Barbara, the experienced Rust dev, might also have used a tracing/instrumentation library from the beginning and have that to fall back on rather than having to do the work to add it now.
 
-[character]: ../characters.md
+[characters]: ../characters.md
 [status quo stories]: ./status_quo.md
 [Alan]: ../characters/alan.md
 [Grace]: ../characters/grace.md