Revert "Fix StepScopeProxyTargetClassOverrideIntegrationTests"

This reverts commit bf2e6ab
as the change was made after spring-framework 6.0.0-M5 was
released. This version is required to release spring-batch
5.0.0-M5

This change will be put back after releasing 5.0.0-M5.

spring-batch-core/src/test/java/org/springframework/batch/core/scope/StepScopeProxyTargetClassOverrideIntegrationTests.java

@@ -41,7 +41,7 @@ public class StepScopeProxyTargetClassOverrideIntegrationTests implements BeanFa
 
 	private static final String JDK_PROXY_TO_STRING_REGEX = "class .*\\$Proxy\\d+";
 
-	private static final String CGLIB_PROXY_TO_STRING_REGEX = "class .*\\$SpringCGLIB.*";
+	private static final String CGLIB_PROXY_TO_STRING_REGEX = "class .*\\$EnhancerBySpringCGLIB.*";
 
 	@Autowired
 	@Qualifier("simple")