Bump org.springframework:spring-core in /easyexcel-support

Bumps [org.springframework:spring-core](https://github.com/spring-projects/spring-framework) from 5.3.27 to 6.0.15.
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](https://github.com/spring-projects/spring-framework/compare/v5.3.27...v6.0.15)

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

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

easyexcel-support/pom.xml

@@ -21,7 +21,7 @@
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-core</artifactId>
-            <version>5.3.27</version>
+            <version>6.0.15</version>
             <exclusions>
                 <exclusion>
                     <groupId>org.springframework</groupId>