changed description

app.py

@@ -23,7 +23,7 @@ description = r"""
 
 ❗️❗️❗️[<b>Important</b>] Instructions:<br>
 1️⃣ <b>Upload the PDF document</b>: Select the PDF file you want to convert into slides.<br>
-2️⃣ <b>Specify the number of pages</b>: Indicate the range of pages you'd like to include in the slide generation.<br>
+2️⃣ <b>Specify the number of pages</b>: Indicate the range of pages you'd like to include in the slide generation.<b>Set it to 0</b> if you want to include all pages <br>
 3️⃣ <b>Click the Generate button</b>: Initiate the slide generation process by clicking the designated "Generate" button.<br>
 4️⃣ <b>Wait for approximately 200 seconds</b>: Allow a brief moment for the system to generate the slides. The process may take up to 200 seconds.<br>
 """