[man] Fix AOT temp path option description

It's `temp-path` in the code, not `temp_path`

man/mono.1

@@ -300,7 +300,7 @@ mono_aot_register_module (mono_aot_module_hello_info);
 .I stats
 Print various stats collected during AOT compilation.
 .TP
-.I temp_path=[path]
+.I temp-path=[path]
 Explicitly specify path to store temporary files created during AOT compilation.
 .TP
 .I threads=[number]