...add missing commas in maintainers list

library/backdrop

@@ -1,7 +1,7 @@
 Maintainers: Mike Pirog <[email protected]> (@pirog),
              Geoff St. Pierre <[email protected]> (@serundeputy),
-             Jen Lampton <[email protected]> (@jenlampton)
-             Pol Dellaiera <[email protected]> (@drupol)
+             Jen Lampton <[email protected]> (@jenlampton),
+             Pol Dellaiera <[email protected]> (@drupol),
              Greg Netsas <[email protected]> (@klonos)
 GitRepo: https://github.com/backdrop-ops/backdrop-docker.git