add `btn-primary` to cookie banner offcanvas

src/pages/cookie-banner.html

@@ -12,12 +12,12 @@ menu: extra.cookie-banner
 					<strong>Do you like cookies?</strong> 🍪 We use cookies to ensure you get the best experience on our website. <a href="{{ site.base }}/terms-of-service.html" target="_blank">Learn more</a>
 				</div>
 				<div class="col-auto">
-					<button type="button" class="btn" data-bs-dismiss="offcanvas">
+					<button type="button" class="btn btn-primary" data-bs-dismiss="offcanvas">
 						Essential Cookies Only
 					</button>
 				</div>
 				<div class="col-auto">
-					<button type="button" class="btn" data-bs-dismiss="offcanvas">
+					<button type="button" class="btn btn-primary" data-bs-dismiss="offcanvas">
 						Allow All Cookies
 					</button>
 				</div>