config: temporarily switch to fork for cli markdown files

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

Author: thaJeztah

_config.yml

@@ -151,9 +151,10 @@ defaults:
 #   - dest is the destination path within the working tree
 #   - src is a list of glob source paths within the remote repository
 fetch-remote:
-  - repo: "https://github.com/docker/cli"
+  # FIXME(thaJeztah): temporarily using branch from https://github.com/docker/cli/pull/3525 to fix htmlproofer validation
+  - repo: "https://github.com/thaJeztah/cli"
     default_branch: "master"
-    ref: "20.10"
+    ref: "20.10_backport_anchor_tags"
     paths:
       - dest: "engine/extend"
         src: