Update hub.docker.nexus3.linkurious.net/linkurious/docker-agent-jnlp Docker tag to v0.0.31 (#90)

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

Author: renovate[bot]

Dockerfile

@@ -1,5 +1,5 @@
 ARG PRIVATE_REGISTRY=hub.docker.nexus3.linkurious.net/
-FROM ${PRIVATE_REGISTRY}linkurious/docker-agent-jnlp:0.0.30
+FROM ${PRIVATE_REGISTRY}linkurious/docker-agent-jnlp:0.0.31
 LABEL maintainer="Edward Nys <edward@linkurio.us>"
 SHELL ["/bin/bash", "-o", "pipefail", "-c"]
 USER root