Update YAMLs to new logwrite package

Signed-off-by: Rolf Neugebauer <rolf.neugebauer@docker.com>

examples/logging.yml

@@ -25,7 +25,7 @@ services:
     image: alpine:3.8
     command: ["/bin/sh", "-c", "while /bin/true; do echo hello $(date); sleep 1; done" ]
   - name: write-and-rotate-logs
-    image: linuxkit/logwrite:v0.5
+    image: linuxkit/logwrite:d9778c0d538094d398cf0cbfc89277aeca67f1be
   - name: kmsg
     image: linuxkit/kmsg:v0.5
 trust: