follow up on #2367: rel="nofollow" on in-list labels

The forgejo/forgejo#2367 pull requests added rel="nofollow" on filters in the
menu, this commit adds it on the labels in the listing and a few other places.

modules/templates/util_render.go

@@ -245,7 +245,7 @@ func RenderLabels(ctx context.Context, locale translation.Locale, labels []*issu
 		if isPull {
 			issuesOrPull = "pulls"
 		}
-		htmlCode += fmt.Sprintf("<a href='%s/%s?labels=%d'>%s</a> ",
+		htmlCode += fmt.Sprintf("<a href='%s/%s?labels=%d' rel='nofollow'>%s</a> ",
 			repoLink, issuesOrPull, label.ID, RenderLabel(ctx, locale, label))
 	}
 	htmlCode += "</span>"

templates/repo/issue/labels/label.tmpl

@@ -2,6 +2,7 @@
 	class="item {{if not .label.IsChecked}}tw-hidden{{end}}"
 	id="label_{{.label.ID}}"
 	href="{{.root.RepoLink}}/{{if or .root.IsPull .root.Issue.IsPull}}pulls{{else}}issues{{end}}?labels={{.label.ID}}"{{/* FIXME: use .root.Issue.Link or create .root.Link */}}
+	rel="nofollow"
 >
 	{{- RenderLabel $.Context ctx.Locale .label -}}
 </a>

templates/shared/issuelist.tmpl

@@ -21,7 +21,7 @@
 						{{end}}
 						<span class="labels-list tw-ml-1">
 							{{range .Labels}}
-								<a href="?q={{$.Keyword}}&type={{$.ViewType}}&state={{$.State}}&labels={{.ID}}{{if ne $.listType "milestone"}}&milestone={{$.MilestoneID}}{{end}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}&fuzzy={{$.IsFuzzy}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{RenderLabel $.Context ctx.Locale .}}</a>
+								<a href="?q={{$.Keyword}}&type={{$.ViewType}}&state={{$.State}}&labels={{.ID}}{{if ne $.listType "milestone"}}&milestone={{$.MilestoneID}}{{end}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}&fuzzy={{$.IsFuzzy}}{{if $.ShowArchivedLabels}}&archived=true{{end}}" rel="nofollow">{{RenderLabel $.Context ctx.Locale .}}</a>
 							{{end}}
 						</span>
 					</div>