minor #1149 [Site] Fix package "install command" background (smnandre)

This PR was merged into the 2.x branch.

Discussion
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[Site] Fix package "install command" background

It seems i let this ugly visual bug happen in prod... i'm absolutely sorry and I'll make sure it doesn't happen again.

![bugbizar](https://github.com/symfony/ux/assets/1359581/0cd992c6-9d1f-4980-8aa6-ca57b2fe9be8)

Commits
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af243bb Fix package "install command" background

ux.symfony.com/assets/styles/components/_TerminalCommand.scss

@@ -41,7 +41,7 @@
   font-size: .9rem;
   padding: 0 .5rem;
   width: inherit;
-  overflow: scroll;
+  overflow: clip;
   margin: 0;
 }