Add stealthybox to Maintainers

Membership from #234

@kingdonb @stefanprodan @mewzherder @matheuscscp @scottrigby 

Signed-off-by: leigh capili <stealthybox@users.noreply.github.com>

MAINTAINERS

@@ -5,6 +5,7 @@ https://cloud-native.slack.com in #flux (https://cloud-native.slack.com/messages
 In alphabetical order:
 
 Kingdon Barrett, Independent <kingdon@tuesdaystudios.com> (github: @kingdonb, slack: Kingdon B)
+Leigh Capili, Flox <capileigh@gmail.com> (github: @stealthybox, slack: Leigh Capili)
 Matheus Pimenta, Luma Health <matheuscscp@gmail.com> (github: @matheuscscp, slack: matheuscscp)
 Scott Rigby, Independent <scott@r6by.com> (github: @scottrigby, slack: scottrigby)
 Stefan Prodan, ControlPlane <stefan.prodan@gmail.com> (github: @stefanprodan, slack: stefanprodan)