Bump org.springframework:spring-context

Bumps [org.springframework:spring-context](https://github.com/spring-projects/spring-framework) from 5.2.7.RELEASE to 5.2.21.RELEASE.
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](spring-projects/spring-framework@v5.2.7.RELEASE...v5.2.21.RELEASE)

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

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

pom.xml

@@ -129,7 +129,7 @@
     <dependency>
       <groupId>org.springframework</groupId>
       <artifactId>spring-context</artifactId>
-      <version>5.2.7.RELEASE</version>
+      <version>5.2.21.RELEASE</version>
     </dependency>
 
     <dependency>