use mssql 2017

Author: techknowlogick

.github/workflows/pull-db-tests.yml

@@ -205,7 +205,7 @@ jobs:
     runs-on: ubuntu-latest
     services:
       mssql:
-        image: mcr.microsoft.com/mssql/server:2019-latest
+        image: mcr.microsoft.com/mssql/server:2017-latest
         env:
           ACCEPT_EULA: Y
           MSSQL_PID: Standard