feat: update version to v1.2.1 and change upgrade link to OTA in HTML files; modify updateSpoolTagId function to return boolean

html/index.html

@@ -12,7 +12,7 @@
         <div style="display: flex; align-items: center; gap: 2rem;">
             <img src="/logo.png" alt="FilaMan Logo" class="logo">
             <div class="logo-text">
-                <h1>FilaMan<span class="version">v1.2.0</span></h1>
+                <h1>FilaMan<span class="version">v1.2.1</span></h1>
                 <h4>Filament Management Tool</h4>
             </div>
         </div>
@@ -21,7 +21,7 @@
             <a href="/waage">Scale</a>
             <a href="/spoolman">Spoolman/Bambu</a>
             <a href="/about">About</a>
-            <a href="/upgrade">Upgrade</a>
+            <a href="/ota">Upgrade</a>
         </nav>
         <div class="status-container">
             <div class="status-item">