Merge pull request #31 from aws-samples/dependabot/maven/org.springframework-spring-core-5.3.20

Bump spring-core from 5.3.18 to 5.3.20

Author: t0shiii

pom.xml

@@ -9,7 +9,7 @@
   <url>http://maven.apache.org</url>
 
   <properties>
-    <spring.version>5.3.18</spring.version>
+    <spring.version>5.3.20</spring.version>
   </properties>
 
   <dependencyManagement>