refactor: swap the lucide upload icon for phosphor

src/pages/pdf-multi-tool.html

@@ -376,8 +376,7 @@
           class="hidden border-2 border-dashed border-gray-600 rounded-lg p-6 sm:p-12 text-center max-w-full cursor-pointer"
         >
           <i
-            data-lucide="upload-cloud"
-            class="w-12 h-12 sm:w-16 sm:h-16 mx-auto text-gray-400 mb-3 sm:mb-4"
+            class="ph ph-upload-simple inline-block text-5xl sm:text-6xl text-gray-400 mb-3 sm:mb-4"
           ></i>
           <p
             class="text-gray-300 text-base sm:text-lg mb-1 sm:mb-2"