Update maintainers (#11306)

library/vault

@@ -1,6 +1,7 @@
-Maintainers: Chris Hoffman <[email protected]> (@chrishoffman),
-             Jeff Mitchell <[email protected]> (@jefferai),
-             Matthew Irish <[email protected]> (@meirish)
+Maintainers: Jim Kalafut <[email protected]> (@kalafut),
+             Meggie Ladlow <[email protected]> (@mladlow),
+             Calvin Leung Huang <[email protected]> (@calvn),
+             Nick Cabatoff <[email protected]> (@ncabatoff)
 GitRepo: https://github.com/hashicorp/docker-vault.git
 
 Tags: 1.9.0-rc1