Use primary as button color (go-gitea#32949) (go-gitea#32950)

Backport go-gitea#32949 by wxiaoguang

* Fix go-gitea#32871
* Fix go-gitea#32948

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

Author: GiteaBot

templates/repo/clone_panel.tmpl

@@ -1,4 +1,4 @@
-<button class="ui green button js-btn-clone-panel">
+<button class="ui primary button js-btn-clone-panel">
 	<span>{{svg "octicon-code" 16}} Code</span>
 	{{svg "octicon-triangle-down" 14 "dropdown icon"}}
 </button>

templates/repo/code/upstream_diverging_info.tmpl

@@ -10,7 +10,7 @@
 		{{end}}
 	</div>
 	{{if .CanWriteCode}}
-	<button class="ui compact green button tw-m-0 link-action" data-url="{{.Repository.Link}}/branches/merge-upstream?branch={{.BranchName}}">
+	<button class="ui compact primary button tw-m-0 link-action" data-url="{{.Repository.Link}}/branches/merge-upstream?branch={{.BranchName}}">
 		{{ctx.Locale.Tr "repo.pulls.upstream_diverging_merge"}}
 	</button>
 	{{end}}