chore: update PostgreSQL versions

Author: CloudNativePG Automated Updates

docker-bake.hcl

@@ -22,11 +22,11 @@ url = "https://github.com/cloudnative-pg/postgres-containers"
 
 // PostgreSQL versions to build
 postgreSQLVersions = [
-  "14.20",
-  "15.15",
-  "16.11",
-  "17.7",
-  "18.1"
+  "14.21",
+  "15.16",
+  "16.12",
+  "17.8",
+  "18.2"
 ]
 
 // PostgreSQL preview versions to build, such as "18~beta1" or "18~rc1"