Upgrade Spring Boot 2.7.2 -> 2.7.3 (#207)

See:
- https://github.com/spring-projects/spring-boot/releases/tag/v2.7.3
- spring-projects/spring-boot@v2.7.2...v2.7.3

pom.xml

@@ -425,7 +425,7 @@
             <dependency>
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-test</artifactId>
-                <version>2.7.2</version>
+                <version>2.7.3</version>
             </dependency>
             <dependency>
                 <groupId>org.testng</groupId>