Link to the 9.0 milestone issues

Author: roji

conceptual/EFCore.PG/release-notes/9.0.md

@@ -57,6 +57,10 @@ See [this post](https://www.cybertec-postgresql.com/en/unexpected-downsides-of-u
 
 Thanks to [@ChrisJollyAU](https://github.com/ChrisJollyAU) and [@Timovzl](https://github.com/Timovzl) for contributing this improvement!
 
+## Other new features
+
+Version 9.0 contains other smaller features and bug fixes, [see the 9.0.0 milestone](https://github.com/npgsql/efcore.pg/milestone/61?closed=1) for the full list of Npgsql EF provider issues.
+
 ## Breaking changes
 
 ### Enum mappings must now be configured at the EF level