Fixing releases.properties to add latest download location.

Author: jwaisner

releases.properties

@@ -6,3 +6,4 @@
 14.4 = https://github.com/Bearsampp/module-postgresql/releases/download/2022.08.04/bearsampp-postgresql-14.4-2022.08.04.7z
 14.5 = https://github.com/Bearsampp/module-postgresql/releases/download/2022.08.28/bearsampp-postgresql-14.5-2022.08.28.7z
 15.0 = https://github.com/Bearsampp/module-postgresql/releases/download/2022.10.28/bearsampp-postgresql-15.0-2022.10.28.7z
+15.2 = https://github.com/Bearsampp/module-postgresql/releases/download/2023.4.20/bearsampp-postgresql-15.2-2023.4.20.7z