Bump spring-security-core in /taverna-server-webapp

Bumps [spring-security-core](https://github.com/spring-projects/spring-security) from 3.1.4.RELEASE to 5.5.7.
- [Release notes](https://github.com/spring-projects/spring-security/releases)
- [Changelog](https://github.com/spring-projects/spring-security/blob/main/RELEASE.adoc)
- [Commits](https://github.com/spring-projects/spring-security/compare/3.1.4.RELEASE...5.5.7)

---
updated-dependencies:
- dependency-name: org.springframework.security:spring-security-core
  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..0890384 100644
--- a/taverna-server-webapp/pom.xml
+++ b/taverna-server-webapp/pom.xml
@@ -30,7 +30,7 @@
 	<properties>
 		<version.cxf>2.7.7</version.cxf>
 		<version.spring>3.2.5.RELEASE</version.spring>
-		<version.spring-security>3.1.4.RELEASE</version.spring-security>
+		<version.spring-security>5.5.7</version.spring-security>
 		<version.asm>5.1</version.asm>
 		<version.smack>3.2.1</version.smack>
 		<version.jdoapi>3.2.0-m5</version.jdoapi>