Update GitLab Shell to v13.11.0

This fixes a regression in the gl-id used for pre-receive hooks from
gitlab-shell, via gitaly, affecting deploy keys.

GITLAB_SHELL_VERSION

-13.10.0
+13.11.0

changelogs/unreleased/update-gitlab-shell-13-11-0.yml

+---
+title: Update GitLab Shell to v13.11.0
+merge_request: 45660
+author:
+type: other