update app.py

app.py

@@ -10,7 +10,7 @@ def tokenize(text):
 num_input_lines = 3
 input_placeholder = "Please input text here."
 title = "Japanese tokenization demo"
-default_text = "ここにテキストを入力し、Submit を押してください。"
+default_text = "ここにテキストを入力し、Enter を押してください。"
 description = """
 This is a demo page for nagisa's tokenization.
 Nagisa is a Python module used for tokenizing and performing Part-of-Speech (POS) tagging on Japanese text.