docs: enable 'edit on GitHub' link

See attached screenshot.

Signed-off-by: Andrey Smirnov <andrey.smirnov@siderolabs.com>

website/config.toml

@@ -116,17 +116,17 @@ version_menu = "Releases"
 url_latest_version = "/v1.8"
 
 # Repository configuration (URLs for in-page links to opening issues and suggesting changes)
-# github_repo = "https://github.com/googley-example"
+github_repo = "https://github.com/siderolabs/talos"
 
 # An optional link to a related project repo. For example, the sibling repository where your product code lives.
 # github_project_repo = "https://github.com/googley"
 
 # Specify a value here if your content directory is not in your repo's root directory
-# github_subdir = ""
+github_subdir = "website"
 
 # Uncomment this if you have a newer GitHub repo with "main" as the default branch,
 # or specify a new value if you want to reference another branch in your GitHub links
-# github_branch= "main"
+github_branch= "main"
 
 # Google Custom Search Engine ID. Remove or comment out to disable search.
 # gcs_engine_id = "d72aa9b2712488cc3"

website/themes/docsy/layouts/partials/page-meta-links.html

@@ -11,11 +11,7 @@
   <a href="{{ $gh_url }}" target="_blank"><i class="fa fa-edit fa-fw"></i> {{ T "post_edit_this" }}</a>
 {{ else if $gh_repo -}}
   {{ $gh_repo_path := printf "%s/content/%s" $gh_branch $pathFormatted -}}
-  {{ if and ($gh_subdir) (.Site.Language.Lang) -}}
-    {{ $gh_repo_path = printf "%s/%s/content/%s/%s" $gh_branch $gh_subdir ($.Site.Language.Lang) $pathFormatted -}}
-  {{ else if .Site.Language.Lang -}}
-    {{ $gh_repo_path = printf "%s/content/%s/%s" $gh_branch ($.Site.Language.Lang) $pathFormatted -}}
-  {{ else if $gh_subdir -}}
+  {{ if $gh_subdir -}}
     {{ $gh_repo_path = printf "%s/%s/content/%s" $gh_branch $gh_subdir $pathFormatted -}}
   {{ end -}}
 
@@ -39,7 +35,6 @@
 
   <a href="{{ $viewURL }}" class="td-page-meta--view" target="_blank" rel="noopener"><i class="fa fa-file-alt fa-fw"></i> {{ T "post_view_this" }}</a>
   <a href="{{ $editURL }}" class="td-page-meta--edit" target="_blank" rel="noopener"><i class="fa fa-edit fa-fw"></i> {{ T "post_edit_this" }}</a>
-  <a href="{{ $newPageURL }}" class="td-page-meta--child" target="_blank" rel="noopener"><i class="fa fa-edit fa-fw"></i> {{ T "post_create_child_page" }}</a>
   <a href="{{ $issuesURL }}" class="td-page-meta--issue" target="_blank" rel="noopener"><i class="fab fa-github fa-fw"></i> {{ T "post_create_issue" }}</a>
   {{ with $gh_project_repo -}}
     {{ $project_issueURL := printf "%s/issues/new" . -}}