added icons to style

assets/sass/_theme/design-system/footer.sass

@@ -34,14 +34,23 @@ footer#document-footer
         @if $footer-icons-enabled
             &-social li a
                 &.facebook
-                    @include icon(facebook, after)
+                    @include icon(social-facebook, after)
                 &.instagram
-                    @include icon(instagram, after)
+                    @include icon(social-instagram, after)
                 &.linkedin
-                    @include icon(linkedin, after)
+                    @include icon(social-linkedin, after)
                 &.mastodon
+                    @include icon(social-mastodon, after)
                 &.youtube
+                    @include icon(social-youtube, after)
                 &.x
+                    @include icon(social-x, after)
+                &.peertube
+                    @include icon(social-peertube, after)
+                &.vimeo
+                    @include icon(social-vimeo, after)
+                &.tiktok
+                    @include icon(social-tiktok, after)
                 &::after
                     margin-left: $spacing0
                     font-size: $h3-size