Fix tracker message when goal is reached

pages/index/index.vue

@@ -64,7 +64,8 @@
       </svg>
       <MililiterInput :id="'goal'" v-model="goal">
         <!--suppress XmlInvalidId -->
-        <label for="goal">You're <span>{{ fillPercentage }}%</span> of the way to your goal of</label>
+        <label v-if="fillPercentage < 100" for="goal">You're <span>{{ fillPercentage }}%</span> of the way to your goal of</label>
+        <label v-if="fillPercentage === 100" for="goal">you have <span>reached</span> your goal of</label>
       </MililiterInput>
       <NuxtLink to="/add-water">
         <button>