ci: fix hosts in ssh config

Author: fiftin

deployment/docker/server/Dockerfile

@@ -59,7 +59,7 @@ RUN apk add --no-cache -U \
     chown -R semaphore:0 /opt/semaphore && \
     find /usr/lib/python* -iname __pycache__ | xargs rm -rf
 
-RUN echo 'Host *\n  StrictHostKeyChecking no\n  UserKnownHostsFile /dev/null' > /etc/ssh/ssh_config.d/semaphore.conf
+RUN echo $'Host *\n  StrictHostKeyChecking no\n  UserKnownHostsFile /dev/null' > /etc/ssh/ssh_config.d/semaphore.conf
 
 COPY --chown=1001:0 ./deployment/docker/server/ansible.cfg /etc/ansible/ansible.cfg
 COPY --from=builder /go/src/semaphore/deployment/docker/server/server-wrapper /usr/local/bin/