Avoid opening new tab when downloading actions logs (#36740)

`target="_blank"` causes the browser to flash a new tab when actions
logs are downloaded. Using the
[`download`](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements/a#download)
attribute fixes this.

web_src/js/components/RepoActionView.vue

@@ -626,7 +626,7 @@ export default defineComponent({
                 </a>
 
                 <div class="divider"/>
-                <a :class="['item', !currentJob.steps.length ? 'disabled' : '']" :href="run.link+'/jobs/'+jobIndex+'/logs'" target="_blank">
+                <a :class="['item', !currentJob.steps.length ? 'disabled' : '']" :href="run.link+'/jobs/'+jobIndex+'/logs'" download>
                   <i class="icon"><SvgIcon name="octicon-download"/></i>
                   {{ locale.downloadLogs }}
                 </a>