fix type [skip ci]

Author: mishaschwartz

CHANGES.md

@@ -27,7 +27,7 @@
   Note that enabling network mode also requires setting `MAGPIE_NETWORK_INSTANCE_NAME` to a unique
   name within the network.
 
-  Upgrading to this version does not require any database migration and if fully backwards compatible
+  Upgrading to this version does not require any database migration and is fully backwards compatible
   with previous versions.
 
   This change also introduces the ability to set