ci(gitlab-ci): use GHCR mirror of build image for mkdocs-material

Also updated some VS Code workspace configs for the repo

Signed-off-by: Andrei Jiroh Halili <ajhalili2006@andreijiroh.xyz>

.gitlab-ci.yml

 # The Docker image that will be used to build your app
 image:
-  name: quay.io/ajhalili2006/mkdocs-material-build-ci:latest
+  name: ghcr.io/ajhalili2006/website/build-ci:latest
 
 stages:
   - test

.vscode/settings.json

@@ -14,7 +14,11 @@
         "mkdocs",
         "pipenv",
         "stylesheets",
-        "announcement"
+        "announcement",
+        "daily-notes",
+        "changelog",
+        "multiverse",
+        "legal"
     ],
     "conventionalCommits.autoCommit": false,
     "git.alwaysSignOff": true,