SEBA-271 update to plyxproto-3.1.0

Change-Id: I29a42c27c7f5c55110beb1eee2b48afcecc84ffb
diff --git a/containers/chameleon/Dockerfile.chameleon b/containers/chameleon/Dockerfile.chameleon
index cf9deeb..b544cab 100644
--- a/containers/chameleon/Dockerfile.chameleon
+++ b/containers/chameleon/Dockerfile.chameleon
@@ -13,7 +13,7 @@
 # limitations under the License.
 
 # xosproject/chameleon
-FROM xosproject/xos-base:2.1.12
+FROM xosproject/xos-base:2.1.13
 
 # xos-base already has protoc and dependencies installed