chore(deps): update gameservermanagers/gameserver:pmc docker digest to 31a6976 (#329)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

images/minecraft-paper-base/Dockerfile

@@ -1,6 +1,6 @@
 FROM hairyhenderson/gomplate:v4.3.0@sha256:5e24d79d00b99d22ac248473ac09dc3a06f41024ca78d6905650057f296206cb AS gomplate
 
-FROM gameservermanagers/gameserver:pmc@sha256:6e07e2dcf0d3c985fee2e8643c41d0ded2a02f671d41f8ab7c4837b82f514e1e
+FROM gameservermanagers/gameserver:pmc@sha256:31a6976de4637a20bb0156a071139c3d595c6686a167f0f7d0c685419a67b89a
 ARG IMAGE_DIR
 
 # Upgrade java version (remove this if the base image is updated)