Merge pull request #21308 from overleaf/jel-back-links

[web] Use standard black link CSS for back links

GitOrigin-RevId: 7b26a9a4635ecbd722920407cd8cf900fc394172

services/web/frontend/stylesheets/bootstrap-5/components/link.scss

@@ -3,25 +3,9 @@
 }
 
 .previous-page-link {
+  @extend .link-black-text;
   @include body-sm;
 
-  text-decoration: none;
-  font-weight: 600;
-  color: var(--neutral-90);
-
-  &:hover {
-    text-decoration: underline;
-    color: var(--green-60);
-  }
-
-  &:visited {
-    color: var(--neutral-90);
-
-    &:hover {
-      color: var(--green-60);
-    }
-  }
-
   i {
     margin-right: var(--spacing-02);
     padding-bottom: 3px;