Revert version to 20.7.0.0

The change occurred due to backmerging 20.6 into 20.7 after the
20.7 code freeze already occurred.

But of course we don't want the version to go back to 20.6.x

Co-authored-by: Olivier Halligon <[email protected]>

Author: mokagio

config/Version.Public.xcconfig

@@ -1,4 +1,4 @@
 CURRENT_PROJECT_VERSION = $VERSION_LONG
 MARKETING_VERSION = $VERSION_SHORT
-VERSION_LONG = 20.6.0.4
-VERSION_SHORT = 20.6
+VERSION_LONG = 20.7.0.0
+VERSION_SHORT = 20.7