Merge pull request #345 from google/contributing

CONTRIBUTING: update maintainers list

Author: josephlr

CONTRIBUTING.md

@@ -19,7 +19,7 @@ again.
 
 __IMPORTANT__: Any significant security issues should __NOT__ be reported in
 the public issue tracker. Practice responsible disclosure by emailing
-<joerichey@google.com> and <tyhicks@canonical.com> directly.
+<joerichey@google.com> and <ebiggers@google.com> directly.
 
 Any bugs, problems, or design discussion relating to fscrypt should be raised
 in the [Github Issue Tracker](https://github.com/google/fscrypt/issues/new).