add its-linprodjob1 to known hosts

This is to enable CI/CD deploy jobs to its-linprodjob1

alpine-ssh-client/Dockerfile

@@ -30,4 +30,5 @@ RUN mkdir -p ~/.ssh && chmod 700 ~/.ssh \
                       its-ads-saml-proxy.unl.edu,129.93.168.174 \
                       is-appstuq.unl.edu,129.93.138.30 \
                       its-foodborne.unl.edu,144.216.202.4 \
+                      its-linprodjob1.unl.edu,10.1.6.31 \
                       >> ~/.ssh/known_hosts