feat(new-styles): add css styles for footnotes and table text

Signed-off-by: Laura Santamaria <nimbinatus@users.noreply.github.com>

Author: nimbinatus

themes/devopsdays-theme/assets/scss/custom.scss

@@ -675,4 +675,12 @@ h3.program-page {
 .social-yt:hover {
   color: rgb(224, 52, 52);
   text-decoration: none;
+}
+
+.footnotes {
+  font-size: 0.75rem;
+}
+
+.small-table-text {
+  font-size: 0.75rem;
 }