Fix minor typo in governance doc

While at it, also relinquish active commit rights:
[x years between commits] is probably a poster child example of inactivity :)
Signed-off-by: NEric Blake <eblake@redhat.com>

AUTHORS.in

@@ -27,7 +27,6 @@ Jim Meyering <meyering@redhat.com>
 Jiří Denemark <jdenemar@redhat.com>
 John Ferlan <jferlan@redhat.com>
 John Levon <john.levon@sun.com>
-Justin Clift <jclift@redhat.com>
 Laine Stump <laine@redhat.com>
 Mark McLoughlin <markmc@redhat.com>
 Martin Kletzander <mkletzan@redhat.com>
@@ -45,6 +44,7 @@ Previous maintainers:
 Atsushi SAKAI <sakaia@jp.fujitsu.com>
 Dan Smith <danms@us.ibm.com>
 Dave Leskovec <dlesko@linux.vnet.ibm.com>
+Justin Clift <jclift@redhat.com>
 Karel Zak <kzak@redhat.com>
 
 Patches have also been contributed by:

docs/governance.html.in

@@ -24,7 +24,7 @@
       project community taken as a whole, all members (whether users,
       contributors or committers) are expected to abide by the project's
       code of conduct. At a high level the code can be summarized as
-      <em>"be excellant to each other"</em>. Expanding on this:
+      <em>"be excellent to each other"</em>. Expanding on this:
     </p>
 
     <ul>