minecraft: bump paper to 1.16.4

Change-Id: I73e799440df07de4bb1bdd31c01d07f4db0f1e2f
diff --git a/personal/q3k/minecraft/Dockerfile-paper b/personal/q3k/minecraft/Dockerfile-paper
index 048524d..d9b6c67 100644
--- a/personal/q3k/minecraft/Dockerfile-paper
+++ b/personal/q3k/minecraft/Dockerfile-paper
@@ -26,7 +26,7 @@
 
 USER minecraft
 WORKDIR /home/minecraft
-ARG VERSION=1.16.1
+ARG VERSION=1.16.4
 
 RUN set -e -x ;\
     wget --quiet https://papermc.io/api/v1/paper/${VERSION}/latest/download ;\