Fix links in issue card (#28806) (#28807)

Backport #28806 by @denyskon

Fixes_
#23318 (comment)

Co-authored-by: Denys Konovalov <kontakt@denyskon.de>

templates/repo/issue/card.tmpl

@@ -33,7 +33,7 @@
 		</div>
 		{{if .MilestoneID}}
 		<div class="meta gt-my-2">
-			<a class="milestone" href="{{$.Page.RepoLink}}/milestone/{{.MilestoneID}}">
+			<a class="milestone" href="{{.Repo.Link}}/milestone/{{.MilestoneID}}">
 				{{svg "octicon-milestone" 16 "gt-mr-2 gt-vm"}}
 				<span class="gt-vm">{{.Milestone.Name}}</span>
 			</a>
@@ -42,7 +42,7 @@
 		{{if $.Page.LinkedPRs}}
 		{{range index $.Page.LinkedPRs .ID}}
 		<div class="meta gt-my-2">
-			<a href="{{$.Page.RepoLink}}/pulls/{{.Index}}">
+			<a href="{{$.Issue.Repo.Link}}/pulls/{{.Index}}">
 				<span class="gt-m-0 text {{if .PullRequest.HasMerged}}purple{{else if .IsClosed}}red{{else}}green{{end}}">{{svg "octicon-git-merge" 16 "gt-mr-2 gt-vm"}}</span>
 				<span class="gt-vm">{{.Title}} <span class="text light grey">#{{.Index}}</span></span>
 			</a>
@@ -54,7 +54,7 @@
 	{{if or .Labels .Assignees}}
 	<div class="extra content labels-list gt-p-0 gt-pt-2">
 		{{range .Labels}}
-			<a target="_blank" href="{{$.Page.RepoLink}}/issues?labels={{.ID}}">{{RenderLabel ctx .}}</a>
+			<a target="_blank" href="{{$.Issue.Repo.Link}}/issues?labels={{.ID}}">{{RenderLabel ctx .}}</a>
 		{{end}}
 		<div class="right floated">
 			{{range .Assignees}}