Upgrade Spring 5.3.27 -> 5.3.28 (#687)

See:
- https://github.com/spring-projects/spring-framework/releases/tag/v5.3.28
- spring-projects/spring-framework@v5.3.27...v5.3.28

pom.xml

@@ -451,7 +451,7 @@
             <dependency>
                 <groupId>org.springframework</groupId>
                 <artifactId>spring-framework-bom</artifactId>
-                <version>5.3.27</version>
+                <version>5.3.28</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>