CODEOWNERS: add @mbolivar for scripts/support/runner

I'm the primary author and maintainer of these scripts.

Signed-off-by: Marti Bolivar <[email protected]>

Author: Marti Bolivar

CODEOWNERS

@@ -157,6 +157,7 @@ samples/subsys/usb                       @youvedeep @andyross
 scripts/expr_parser.py                   @andrewboie
 scripts/sanity_chk/*                     @andrewboie
 scripts/sanitycheck                      @andrewboie @nashif
+scripts/support/runner/*                 @mbolivar
 subsys/bluetooth/*                       @sjanc @jhedberg @Vudentz
 subsys/bluetooth/controller/*            @carlescufi @cvinayak
 subsys/fs/*                              @nashif