[Docs Site] Expand content column when ToC is hidden (#22059)

Author: KianNH

src/components/overrides/Page.astro

@@ -58,3 +58,9 @@ if (data.updated) {
 ---
 
 <Default set:html={html} />
+
+<style>
+	html:not([data-has-toc]) {
+		--sl-content-width: 67.5rem;
+	}
+</style>