test: fix some in-db config values

To correctly test in-db override of config file values, the former must be different from the latter.

test/io/configs/expected/no-defaults-with-db-other-authenticator.config

@@ -15,13 +15,13 @@ db-prepared-statements = false
 db-root-spec = "other_root"
 db-schemas = "test,other_tenant1,other_tenant2"
 db-config = true
-db-pre-config = "postgrest.pre_config"
+db-pre-config = "postgrest.other_preconf"
 db-tx-end = "rollback-allow-override"
 db-uri = "postgresql://"
 jwt-aud = "https://otherexample.org"
 jwt-role-claim-key = ".\"other\".\"pre_config_role\""
 jwt-secret = "ODERREALLYREALLYREALLYREALLYVERYSAFE"
-jwt-secret-is-base64 = true
+jwt-secret-is-base64 = false
 jwt-cache-max-lifetime = 7200
 log-level = "info"
 openapi-mode = "disabled"