Add release liaisons for manila

A couple of other maintainers can help propose
and review releases.

Change-Id: Ic06f0a9e70386de2e0a1a757c72a1f4cdbdd2d19

data/release_liaisons.yaml

@@ -70,6 +70,12 @@ manila:
   - name: 'Tom Barron'
     irc: tbarron
     email: tpb@dyncloud.net
+  - name: 'Goutham Pacha Ravi'
+    irc: gouthamr
+    email: gouthampravi@gmail.com
+  - name: 'Carlos Eduardo'
+    irc: carloss
+    email: ces.eduardo98@gmail.com
 mistral:
   - name: 'Renat Akhmerov'
     irc: rakhmerov