Radarr/UI/System/Update/UpdateItemViewTemplate.html

<div class="update">
    <fieldset>
        <legend>{{version}} <span class="date">- {{ShortDate releaseDate}} {{currentVersion version}}</span></legend>

        {{#with changes}}
            {{#each new}}
                <div class="change">
                    <span class="label label-success">New</span> {{this}}
                </div>
            {{/each}}

            {{#each fixed}}
                <div class="change">
                    <span class="label label-info">Fixed</span> {{this}}
                </div>
            {{/each}}
        {{/with}}

        {{#unless changes}}
            No notable changes
        {{/unless}}
    </fieldset>
</div>