fix: pom.xml to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JAVA-ORGSPRINGFRAMEWORK-2329097
- https://snyk.io/vuln/SNYK-JAVA-ORGSPRINGFRAMEWORK-2330878
- https://snyk.io/vuln/SNYK-JAVA-ORGSPRINGFRAMEWORK-2434828
- https://snyk.io/vuln/SNYK-JAVA-ORGSPRINGFRAMEWORK-2436751
- https://snyk.io/vuln/SNYK-JAVA-ORGSPRINGFRAMEWORK-2689634
- https://snyk.io/vuln/SNYK-JAVA-ORGSPRINGFRAMEWORKSECURITY-1078232
- https://snyk.io/vuln/SNYK-JAVA-ORGSPRINGFRAMEWORKSECURITY-1290497

pom.xml

@@ -57,7 +57,7 @@
         <dependency>
             <groupId>org.springframework.security.oauth</groupId>
             <artifactId>spring-security-oauth2</artifactId>
-            <version>2.0.13.RELEASE</version>
+            <version>2.5.2.RELEASE</version>
         </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>