Moving nebril to emeritus status due to inactivity

Note, he has been emailed regarding the move including an offer to
re-engage. He has not taken this up. The governance has a 3 months
of inactivity clause that causes maintainers to fall off. This
period has been long exceeded per metrics measured in devstats.

Signed-off-by: Matt Farina <matt@mattfarina.com>

OWNERS

@@ -5,7 +5,6 @@ maintainers:
   - jascott1
   - mattfarina
   - michelleN
-  - nebril
   - prydonius
   - SlickNik
   - technosophos
@@ -27,6 +26,7 @@ reviewers:
   - viglesiasce
 emeritus:
   - migmartri
+  - nebril
   - seh
   - vaikas-google
   - rimusz