Update Gitaly to 0.52.1

Author: solidnerd

Dockerfile

@@ -7,7 +7,7 @@ ENV GITLAB_VERSION=10.2.3 \
     GITLAB_SHELL_VERSION=5.9.4 \
     GITLAB_WORKHORSE_VERSION=3.3.1 \
     GITLAB_PAGES_VERSION=0.6.0 \
-    GITALY_SERVER_VERSION=0.52.0 \
+    GITALY_SERVER_VERSION=0.52.1 \
     GITLAB_USER="git" \
     GITLAB_HOME="/home/git" \
     GITLAB_LOG_DIR="/var/log/gitlab" \