Hello Ravindra,
just open(preview) that html file from KM Content and refresh(press and hold F5 for few seconds). I'd faced the same issue and I did the above mentioned steps. Whenever you upload any object with the same name in KM Content, it doesn't fetch the newly uploaded one sometimes. After refresh(few times) the new file will get's reflected.
To Avoid this, you can use different names for your html file each time when you deploy in KM Content.
Regards,
Kamal