[Website] Update Arrow governance roster

Author: alamb

_data/committers.yml

@@ -123,6 +123,10 @@
   role: PMC
   alias: jakevin
   affiliation: SelectDB
+- name: Jeffrey Vo
+  role: PMC
+  alias: jeffreyvo
+  affiliation: None
 - name: Jonathan Keane
   role: PMC
   alias: jonkeane
@@ -348,10 +352,6 @@
   role: Committer
   alias: jayzhan
   affiliation: None
-- name: Jeffrey Vo
-  role: Committer
-  alias: jeffreyvo
-  affiliation: None
 - name: Ji Liu
   role: Committer
   alias: tianchen
@@ -456,6 +456,10 @@
   role: Committer
   alias: wayne
   affiliation: Greptime
+- name: Ryan Johnson
+  role: Committer
+  alias: scovich
+  affiliation: None
 - name: Sarah Gilmore
   role: Committer
   alias: sgilmore