Document EFCore.PG targeting PostgreSQL version 16 by default (#454)

See npgsql/efcore.pg#3798

Author: roji

conceptual/EFCore.PG/release-notes/11.0.md

@@ -90,3 +90,12 @@ For more details, see the [temporal constraints documentation](../misc/temporal-
 ## Other new features
 
 * Added `EF.Functions.IntersectsBbox(geom1, geom2)` for expressing [the PostGIS `&&` operator](https://postgis.net/docs/geometry_overlaps.html). Thanks to [@bjornharrtell](https://github.com/bjornharrtell) for this contribution!
+
+## Breaking changes
+
+* The provider now assumes at least PostgreSQL 16 by default, taking advantage of newer features (previously, PostgreSQL 14 was targeted). You can configure the targeted PostgreSQL version when configuring your context:
+
+```c#
+protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
+    => optionsBuilder.UseNpgsql("<connection string>", o => o.SetPostgresVersion(14, 0));
+```