chore(deps): update quay.io/fedora/postgresql-15:latest docker digest to 300598e

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

scripts/rhdh-openshift-setup/values.yaml

@@ -391,7 +391,7 @@ upstream:
     image:
       registry: quay.io
       repository: fedora/postgresql-15
-      tag: latest@sha256:2215566496da1221fca8ddd6b906f5e3c718a68605d981c8142fa5c2d7c34d38
+      tag: latest@sha256:300598e73bc08a27ec6791ce216b1fd7e8971a86a68ea6442298bb2c5d689675
     auth:
       secretKeys:
         adminPasswordKey: postgres-password