Fix Spring AI BOM flatten maven plugin configuration

 - Make sure to keep the dependencyManagement entries

Signed-off-by: Ilayaperumal Gopinathan <[email protected]>

Author: ilayaperumalg

spring-ai-bom/pom.xml

@@ -1273,7 +1273,7 @@
 							<flattenMode>ossrh</flattenMode>
 							<pomElements>
 								<distributionManagement>remove</distributionManagement>
-								<dependencyManagement>remove</dependencyManagement>
+								<dependencyManagement>keep</dependencyManagement>
 								<repositories>remove</repositories>
 								<scm>keep</scm>
 								<url>keep</url>