services/horizon: Promote Stellar Core to v19.0.0 stable. (#4353)

Author: Shaptic

.github/workflows/horizon.yml

@@ -34,10 +34,10 @@ jobs:
     env:
       HORIZON_INTEGRATION_TESTS_ENABLED: true
       HORIZON_INTEGRATION_TESTS_CORE_MAX_SUPPORTED_PROTOCOL: ${{ matrix.protocol-version }}
-      PROTOCOL_19_CORE_DEBIAN_PKG_VERSION: 19.0.0-891.rc1.9d0704eb4.focal
-      PROTOCOL_19_CORE_DOCKER_IMG: stellar/stellar-core:19.0.0-891.rc1.9d0704eb4.focal
-      PROTOCOL_18_CORE_DEBIAN_PKG_VERSION: 18.5.0-873.rc1.d387c6a71.focal
-      PROTOCOL_18_CORE_DOCKER_IMG: stellar/stellar-core:18.5.0-873.rc1.d387c6a71.focal
+      PROTOCOL_19_CORE_DEBIAN_PKG_VERSION: 19.0.0-907.9d0704eb4.focal
+      PROTOCOL_19_CORE_DOCKER_IMG: stellar/stellar-core:19.0.0-907.9d0704eb4.focal
+      PROTOCOL_18_CORE_DEBIAN_PKG_VERSION: 19.0.0-907.9d0704eb4.focal
+      PROTOCOL_18_CORE_DOCKER_IMG: stellar/stellar-core:19.0.0-907.9d0704eb4.focal
       PGHOST: localhost
       PGPORT: 5432
       PGUSER: postgres