Update gitlab-workhorse to 8.7.0

Author: Sergey Rusakov

Changelog.md

@@ -7,6 +7,7 @@ https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG.md) for the list o
 - gitlab: upgrade CE to v11.11.0
 - Update gitaly to 1.42.0
 - Update gitlab-shell to 9.1.0
+- Update gitlab-workhorse to 8.7.0
 
 **11.10.4**
 - gitlab: upgrade CE to v11.10.4

Dockerfile

@@ -8,7 +8,7 @@ ENV GITLAB_VERSION=${VERSION} \
     RUBY_VERSION=2.5 \
     GOLANG_VERSION=1.11.9 \
     GITLAB_SHELL_VERSION=9.1.0 \
-    GITLAB_WORKHORSE_VERSION=8.5.2 \
+    GITLAB_WORKHORSE_VERSION=8.7.0 \
     GITLAB_PAGES_VERSION=1.5.0 \
     GITALY_SERVER_VERSION=1.42.0 \
     GITLAB_USER="git" \