fix(web): prevent language select label truncation (#13100)

packages/web/src/components/Footer.astro

@@ -110,8 +110,7 @@ const discord = config.social?.find((item) => item.icon === "discord")
   }
 
   .doc :global(starlight-lang-select select) {
-    min-width: 18ch;
-    max-width: min(100%, 20rem);
+    min-width: 15em;
   }
 
   @media (min-width: 30rem) {