test: Updated Postgres versions used in E2E tests

Signed-off-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: postgres-versions-updater

.github/pg_versions.json

@@ -1,7 +1,7 @@
 {
   "19": [
     "19beta1-system-trixie",
-    "19beta1-202606080938-system-trixie"
+    "19beta1-202606151220-system-trixie"
   ],
   "18": [
     "18.4-system-trixie",