Fix lighthouse bug errors

src/components/AdHome.vue

@@ -10,9 +10,9 @@
             <h1 class="font-bold text-black text-4xl">
               {{ $t('home.ad.env.title') }}
             </h1>
-            <h3 class="px-4 text-xl text-gray-700">
+            <h2 class="px-4 text-xl text-gray-700">
               {{ $t('home.ad.env.description') }}
-            </h3>
+            </h2>
           </div>
         </Ad>
       </nuxt-link>
@@ -25,9 +25,9 @@
             <h1 class="font-bold text-black text-4xl">
               {{ $t('home.ad.contact.title') }}
             </h1>
-            <h3 class="px-4 text-lg text-gray-700">
+            <h2 class="px-4 text-lg text-gray-700">
               {{ $t('home.ad.contact.description') }}
-            </h3>
+            </h2>
           </div>
         </Ad>
       </nuxt-link>

src/components/Post.vue

@@ -2,7 +2,7 @@
   <nuxt-link :to="`/blog/${slug}`">
     <div class="group post w-full text-justify">
       <h1 class="font-black text-3xl duration-300" :class="getHoverColor">{{ $t(title) }}</h1>
-      <h3 class="my-4 text-2xl text-gray-600">{{ $t(description) }}</h3>
+      <h2 class="my-4 text-2xl text-gray-600">{{ $t(description) }}</h2>
       <div class="text-gray-400">
         <span>{{ formatDate }}</span>, <span>{{ reading_time }}</span> min.
       </div>

src/components/Project.vue

@@ -1,5 +1,5 @@
 <template>
-  <a :href="url" target="_blank">
+  <a :href="url" target="_blank" rel="noreferrer noopener">
     <div class="h-full rounded-lg shadow-xl w-full bg-gray-100 dark:bg-gray-800 transform hover:scale-103 duration-300">
       <div class="max-w-full rounded-t-lg border-l-2 border-r-2 border-t-2 border-transparent dark:border-gray-900">
         <img class="w-full rounded-t-lg" :src="`https://athena.arthurdanjou.fr/files/${cover}`" alt="Project Cover" />

src/pages/contact.vue

@@ -4,9 +4,9 @@
       <h1 class="font-bold text-gray-700 text-xl md:text-3xl my-4 dark:text-gray-400 text-center">
         {{ $t('contact.why.title') }}
       </h1>
-      <h3 class="text-lg">
+      <h2 class="text-lg">
         {{ $t('contact.why.description') }}
-      </h3>
+      </h2>
     </section>
     <ContactForm class="w-full"/>
   </main>