fix: jdbc ssl mode parameter (#2224)

diff --git a/hugegraph-dist/src/assembly/static/conf/graphs/hugegraph.properties b/hugegraph-dist/src/assembly/static/conf/graphs/hugegraph.properties
index f920951..5f77efe 100644
--- a/hugegraph-dist/src/assembly/static/conf/graphs/hugegraph.properties
+++ b/hugegraph-dist/src/assembly/static/conf/graphs/hugegraph.properties
@@ -82,7 +82,7 @@
 #jdbc.password=
 #jdbc.reconnect_max_times=3
 #jdbc.reconnect_interval=3
-#jdbc.sslmode=false
+#jdbc.ssl_mode=false
 
 # postgresql & cockroachdb backend config
 #jdbc.driver=org.postgresql.Driver