build(deps): bump spring-core in /examples/JDBC/taosdemo (#16063)

Bumps [spring-core](https://github.com/spring-projects/spring-framework) from 5.3.2 to 5.3.20.
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](https://github.com/spring-projects/spring-framework/compare/v5.3.2...v5.3.20)

---
updated-dependencies:
- dependency-name: org.springframework:spring-core
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Shuduo Sang <sangshuduo@gmail.com>

examples/JDBC/taosdemo/pom.xml

@@ -10,7 +10,7 @@
     <description>Demo project for TDengine</description>
 
     <properties>
-        <spring.version>5.3.16</spring.version>
+        <spring.version>5.3.20</spring.version>
     </properties>
 
     <dependencies>