Make the timezone more permissive

Author: Lindsey B

templates/index.html

@@ -31,7 +31,7 @@ <h1>🌟 <i>Astro Horoscope</i></h1>
     <div class="form-group">
         <label for="timezone_offset">Timezone Offset (e.g., -04:00 for EDT, -05:00 for EST):</label>
         <input type="text" id="timezone_offset" name="timezone_offset" required 
-               placeholder="-04:00" pattern="[+\-]\d{2}:\d{2}">
+               placeholder="-04:00" pattern="[+\-]?\d{1,2}:\d{2}">
         <small style="color: #666;">Format: +/-HH:MM (include daylight savings adjustment)</small>
     </div>