feat: working group footer styles

• feat: working group footer styles

less/astro/layout/_footer.less

@@ -135,3 +135,25 @@
         }
     }
 }
+
+.footer-working-group {
+  &-sponsor {
+    display: flex;
+    justify-content: center;
+    align-items: baseline;
+    gap: 4rem;
+  }
+
+  &-circle-group {
+    display: flex;
+    gap: 2rem;
+    flex-shrink: 0;
+  }
+
+  &-circle {
+    width: 1rem;
+    height: 1rem;
+    background-color: @brand-primary-light;
+    border-radius: 50%;
+  }
+}