Update CHANGELOG for v1.13.0 (#563)

Author: kaidaguerre

CHANGELOG.md

@@ -6,7 +6,7 @@ _Whats new_
 - Allow using `pprof` on FDW when `STEAMPIPE_FDW_PPROF` environment variable is set. ([#368](https://github.com/turbot/steampipe-postgres-fdw/issues/368))
 
 _Bug fixes_
-- Fix issue where the FDW ignored to apply filter for `anyOf` key columns for complex queries. ([#558](https://github.com/turbot/steampipe-postgres-fdw/issues/558))
+- Fix issue where the FDW did not correctly provide planning cost information for key-columns with an `any-of` requirement. This could lead the Postgres planner to choose query plans that do not include filters on those columns, even when filters were present in the query. . ([#558](https://github.com/turbot/steampipe-postgres-fdw/issues/558))
 
 _Dependencies_
 - Upgrade `go-jose/v4` to remediate vulnerabilities.