Merge pull request #26820 from overleaf/mf-fix-btn-class-missing-homepage

[web] Fix missing `.btn` class from the "begin now" card

GitOrigin-RevId: ec51d3875a1a567a6bf051761becb3202e0fb580

services/web/app/views/_mixins/begin_now_card.pug

@@ -17,7 +17,7 @@ mixin begin_now_card
 				p.card-links
 					if !isUserLoggedIn
 						a.btn.btn-primary.card-link(href=registerURL) #{translate("sign_up_for_free")}
-					a.card-link(
+					a.btn.card-link(
 						href=plansURL
 						class={'btn-primary': isUserLoggedIn, 'btn-secondary': !isUserLoggedIn}
 					) #{translate("explore_all_plans")}