Fix version 6.4.9-SNAPSHOT

gradle.properties

@@ -14,7 +14,7 @@
 # limitations under the License.
 #
 springBootVersion=3.3.3
-version=6.4.8-SNAPSHOT
+version=6.4.9-SNAPSHOT
 samplesBranch=6.4.x
 org.gradle.jvmargs=-Xmx3g -XX:+HeapDumpOnOutOfMemoryError
 org.gradle.parallel=true