docs-bug(Homepage): app-support description text reads awkwardly

### Documentation Feedback

At the bottom of the homepage, in the app-support section, at a particular screen size, the description text reads as

" StackOverflow Discord
Questions tagged with angular-Angular Community on Discord
material or angular-cdk"

which is incorrect. Please add a few pixels of spacing between elements so that they always read as intended.

### Affected documentation page

https://material.angular.io/

打开 material.angular.io，并在附图所示的屏幕尺寸下检查主页的 app-support 部分。定位负责 StackOverflow 和 Discord 描述的页面及样式，然后确认在所报告的尺寸下，这些元素仍保持分离且易于阅读。当文本不再连在一起，同时保留预期的主页布局时，即表示完成。

由索引模型根据 Issue 内容生成。