Finish updating versions for Zulip Server 2.0.7.

Signed-off-by: Anders Kaseorg <anders@zulipchat.com>

docker-compose.yml

@@ -28,13 +28,13 @@ services:
     volumes:
       - '/opt/docker/zulip/redis:/var/lib/redis:rw'
   zulip:
-    image: 'zulip/docker-zulip:2.0.5-0'
+    image: 'zulip/docker-zulip:2.0.7-0'
     build:
       context: .
       args:
         # Change these if you want to build zulip from a different repo/branch
         ZULIP_GIT_URL: https://github.com/zulip/zulip.git
-        ZULIP_GIT_REF: 2.0.5
+        ZULIP_GIT_REF: 2.0.7
         # Set this up if you plan to use your own CA certificate bundle for building
         # CUSTOM_CA_CERTIFICATES:
     ports: