fix(deps): update spring boot to v3.5.9 (#321)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

xmpl_java/pom.xml

@@ -15,7 +15,7 @@
 		<!-- DEPENDENCIES VERSION -->
 		<jdk.version>21</jdk.version>
 		<cds.services.version>4.6.0</cds.services.version>
-		<spring.boot.version>3.5.8</spring.boot.version>
+		<spring.boot.version>3.5.9</spring.boot.version>
 		<xsuaa.version>4.3.1</xsuaa.version>
 
 		<cds.install-node.downloadUrl>https://nodejs.org/dist/</cds.install-node.downloadUrl>