Update postgres

Changes:

- https://github.com/docker-library/postgres/commit/cdd56d3: Update 15 to 15rc2, bullseye 15~rc2-1.pgdg110+1

library/postgres

@@ -4,14 +4,14 @@ Maintainers: Tianon Gravi <[email protected]> (@tianon),
              Joseph Ferguson <[email protected]> (@yosifkit)
 GitRepo: https://github.com/docker-library/postgres.git
 
-Tags: 15rc1, 15rc1-bullseye
+Tags: 15rc2, 15rc2-bullseye
 Architectures: amd64, arm32v5, arm32v7, arm64v8, i386, mips64le, ppc64le, s390x
-GitCommit: 66de12a7ee7b5bfa4b12405bded612e9d283a4ac
+GitCommit: cdd56d3b51e4b936f695e444a52eee019561ebb6
 Directory: 15/bullseye
 
-Tags: 15rc1-alpine, 15rc1-alpine3.16
+Tags: 15rc2-alpine, 15rc2-alpine3.16
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
-GitCommit: 66de12a7ee7b5bfa4b12405bded612e9d283a4ac
+GitCommit: cdd56d3b51e4b936f695e444a52eee019561ebb6
 Directory: 15/alpine
 
 Tags: 14.5, 14, latest, 14.5-bullseye, 14-bullseye, bullseye