chore(deps): update memcached docker tag to v1.6.42

Author: renovate[bot]

observability/tempo/docker-compose.yml

@@ -9,7 +9,7 @@ services:
 
   memcached:
     container_name: memcached
-    image: memcached:1.6.41
+    image: memcached:1.6.42
     environment:
       - MEMCACHED_MAX_MEMORY=64m  # Set the maximum memory usage
       - MEMCACHED_THREADS=2       # Number of threads to use