yet another small fix

Author: chernser

jdbc-v2/src/test/java/com/clickhouse/jdbc/DataTypeTests.java

@@ -2031,7 +2031,7 @@ public Object[][] testJSONReadDP() {
         }});
         Map<String, Object> map5 = new HashMap<>();
         map5.put("array", new ArrayList<HashMap<String,Object>>() {{
-            add(new HashMap<>() {{
+            add(new HashMap<String, Object>() {{
                 put("nested.strings", new ArrayList<String>() {{ add("one"); add("two"); add("three"); }});
 
             }});