Fix samples branch

gradle.properties

@@ -15,7 +15,7 @@
 #
 springBootVersion=3.3.3
 version=6.4.8-SNAPSHOT
-samplesBranch=main
+samplesBranch=6.4.x
 org.gradle.jvmargs=-Xmx3g -XX:+HeapDumpOnOutOfMemoryError
 org.gradle.parallel=true
 org.gradle.caching=true