fix(deps): update dependency com.googlecode.xmemcached:xmemcached to v2.4.8 (#8909)

Author: renovate-bot

appengine-java8/memcache/pom.xml

@@ -54,7 +54,7 @@ Copyright 2015 Google Inc.
     <dependency>
       <groupId>com.googlecode.xmemcached</groupId>
       <artifactId>xmemcached</artifactId>
-      <version>2.4.7</version>
+      <version>2.4.8</version>
     </dependency>
     <!-- [END dependencies] -->
   </dependencies>

flexible/java-8/memcache/pom.xml

@@ -53,7 +53,7 @@
     <dependency>
       <groupId>com.googlecode.xmemcached</groupId>
       <artifactId>xmemcached</artifactId>
-      <version>2.4.7</version>
+      <version>2.4.8</version>
     </dependency>
   </dependencies>
   <build>