chore(deps): bump github.com/stackitcloud/stackit-sdk-go/services/postgresflex from 1.2.1 to 1.3.0

chore(deps): bump github.com/stackitcloud/stackit-sdk-go/services/postgresflex from 1.2.1 to 1.3.0 #3139