Merge pull request #5066 from taosdata/hotfix/sangshuduo/TD-2873-fix-jdbcrestfuldemo-compile-issue

[TD-2873] <fix>: fix JdbcRestfulDemo.java compile issue.

tests/examples/JDBC/JDBCDemo/pom.xml

@@ -50,6 +50,7 @@
                 <configuration>
                     <source>8</source>
                     <target>8</target>
+                    <encoding>UTF-8</encoding>
                 </configuration>
             </plugin>