Bump spring-beans in /taverna-server-webapp

Bumps [spring-beans](https://github.com/spring-projects/spring-framework) from 3.2.5.RELEASE to 5.2.20.RELEASE.
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](https://github.com/spring-projects/spring-framework/compare/v3.2.5.RELEASE...v5.2.20.RELEASE)

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

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/taverna-server-webapp/pom.xml b/taverna-server-webapp/pom.xml
index 759d077..3f03ecb 100644
--- a/taverna-server-webapp/pom.xml
+++ b/taverna-server-webapp/pom.xml
@@ -29,7 +29,7 @@
 
 	<properties>
 		<version.cxf>2.7.7</version.cxf>
-		<version.spring>3.2.5.RELEASE</version.spring>
+		<version.spring>5.2.20.RELEASE</version.spring>
 		<version.spring-security>3.1.4.RELEASE</version.spring-security>
 		<version.asm>5.1</version.asm>
 		<version.smack>3.2.1</version.smack>