Bump spring-core from 5.3.17 to 5.3.18 in /core

Bumps [spring-core](https://github.com/spring-projects/spring-framework) from 5.3.17 to 5.3.18.
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](https://github.com/spring-projects/spring-framework/compare/v5.3.17...v5.3.18)

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

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/core/pom.xml b/core/pom.xml
index 25fc888..3c1ab69 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -8,7 +8,7 @@
 	<properties>
 		<java.version>1.8</java.version>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-		<spring.version>5.3.17</spring.version>
+		<spring.version>5.3.18</spring.version>
 		<jersey.version>1.19.4</jersey.version>
 		<jetty.version>9.4.45.v20220203</jetty.version>
 		<hibernate.version>5.6.7.Final</hibernate.version>