Update share_btn.py

share_btn.py

@@ -42,7 +42,7 @@ share_js = """async () => {
     //const outputImg_name = outputImg_src.split('/').pop();
     //let titleTxt = outputImg_name;
     
-    let titleTxt = gradioEl.querySelector('#input-prompt > label > textarea').placeholder;
+    let titleTxt = gradioEl.querySelector('#input-prompt > label > textarea').value;
     if(titleTxt.length > 100){
         titleTxt = titleTxt.slice(0, 100) + ' ...';
     }