vale: allow 'docker/' in link-captions

Try to prevent false-positives on links to GitHub issues, e.g.;

    [docker/docker-ce-packaging#1050](https://github.com/docker/docker-ce-packaging/pull/1050)
    Check failure on line 93 in content/engine/release-notes/27.md

    [vale] reported by reviewdog 🐶
    [Vale.Terms] Use 'Docker' instead of 'docker'.

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

.github/vale/Docker/Capitalization.yml

@@ -0,0 +1,10 @@
+extends: existence
+message: "Please capitalize Docker."
+level: error
+ignorecase: false
+action:
+  name: replace
+  params:
+    - Docker
+tokens:
+  - 'docker(?!/[a-z-]+)'

.github/vale/config/vocabularies/Docker/accept.txt

@@ -35,7 +35,6 @@ Ddosify
 Debootstrap
 Dev Environments?
 Django
-Docker
 Docker Build Cloud
 Docker Business
 Docker Dasboard