Use REL_17_STABLE (#53)

Author: davecramer

.github/workflows/main.yml

@@ -24,7 +24,7 @@ env:
   WORKFLOW_VERSION_POSTGRESQL: '1' # for build steps related to the 'cachePostgres' cache
 
   # Software versions. 
-  POSTGRESQL_SOURCE_TAG: 'REL_17_RC1'
+  POSTGRESQL_SOURCE_TAG: 'REL_17_STABLE'
   POSTGRESQL_PACKAGE_FILEID: '1259019'
   OPENSSL_VERSION: '3_3_2'
   PKGCONFIGLITE_VERSION: '0.28-1'