Upgrade to Spring Session for Apache Geode 2.4.8.

Author: jxblum

gradle.properties

@@ -16,7 +16,7 @@ springDataBomVersion=2020.0.14
 springDataGeodeVersion=2.4.14
 springDataGeodeTestVersion=0.0.24
 springSessionBomVersion=2020.0.7
-springSessionDataGeodeVersion=2.4.7
+springSessionDataGeodeVersion=2.4.8
 springShellVersion=1.2.0.RELEASE
 testcontainersVersion=1.16.0
 version=1.4.12-SNAPSHOT