Upgrade Snap Candidate to MongoDB 6.0.4.

Thanks to MongoDB developers.

snapcraft.yaml

@@ -65,7 +65,7 @@ apps:
 
 parts:
     mongodb:
-        source: https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-ubuntu2004-6.0.3.tgz
+        source: https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-ubuntu2004-6.0.4.tgz
         plugin: dump
         stage-packages:
             - libssl1.1