Issue fixes for RSS feed improvements (#28380)

Follow-up for #28368

- Just replace button with an a-element with the button class
- Remove useless link-action class from template/org/home.tmpl

templates/org/home.tmpl

@@ -21,9 +21,9 @@
 		</div>
 		<div class="right menu">
 			{{if .EnableFeed}}
-			<button class="link-action ui basic label button gt-mr-0" data-tooltip-content="{{ctx.Locale.Tr "rss_feed"}}" data-url="{{$.Org.HomeLink}}.rss">
+			<a class="ui basic label button gt-mr-0" href="{{$.Org.HomeLink}}.rss" data-tooltip-content="{{ctx.Locale.Tr "rss_feed"}}">
 				{{svg "octicon-rss" 24}}
-			</button>
+			</a>
 			{{end}}
 			<button class="link-action ui basic button gt-mr-0" data-url="{{.Org.HomeLink}}?action={{if $.IsFollowing}}unfollow{{else}}follow{{end}}">
 				{{if $.IsFollowing}}

templates/repo/header.tmpl

@@ -54,9 +54,9 @@
 					{{end}}
 					{{if $.EnableFeed}}
 					{{/* An extra div-element is not necessary here, as this button does not secretly contain two buttons. */}}
-					<button class="ui compact small basic button" data-url="{{$.RepoLink}}.rss" data-tooltip-content="{{ctx.Locale.Tr "rss_feed"}}">
+					<a class="ui compact small basic button" href="{{$.RepoLink}}.rss" data-tooltip-content="{{ctx.Locale.Tr "rss_feed"}}">
 						{{svg "octicon-rss" 16}}
-					</button>
+					</a>
 					{{end}}
 					<form method="post" action="{{$.RepoLink}}/action/{{if $.IsWatchingRepo}}un{{end}}watch?redirect_to={{$.Link}}">
 						{{$.CsrfTokenHtml}}