updated FooterComponent.vue to use script setup

src/components/FooterComponent.vue

@@ -33,14 +33,8 @@
   </div>
 </template>
 
-<script>
-export default {
-  name: "FooterComponent",
-  setup() {
-    const version = import.meta.env.VITE_VERSION;
-    return { version };
-  },
-};
+<script setup lang="ts">
+const version = import.meta.env.VITE_VERSION;
 </script>
 
 <style lang="scss" scoped>