How to update chromedriver in selenium?

The answer to the question - how to update chromedriver is -

Yes, it can be done. You need to follow these steps, and you need to choose a tool in which you implement them.
Let's have a look at a few lines in Python, I'll outline the main flow and you might want to build it more powerful (like command line parameters etc.)
First I'll import requests:
import requests
Then I'll save the necessary links into two variables + I define the filename of the desired version of chrome driver:
url = 'https://chromedriver.storage.googleapis.com/LATEST_RELEASE_'
url_file = 'https://chromedriver.storage.googleapis.com/'
file_name = 'chromedriver_linux64.zip'
Now I'll let the user choose a version, and I get the version from the site:
version = input()
version_response = requests.get(url + version)
Finally, it's time to download the zip file (if it exists):
if version_response.text:
    file = requests.get(url_file + version_response.text + '/' + file_name)
    with open(file_name, "wb") as code:
        code.write(file.content)

The result of these steps will be a zip file with a chrome driver in the current directory (from where you ran the script). You also might use the zipfile library to extract the zip file after a successful download. If you want to fully automate this, you probably need to build in command line parameters and pipe the chrome version into your Python script. E.g. in Arch-like systems, you might use $ pacman -Qs chromium for getting Chromium version. Since you don't mention a system architecture on which you want to build this, I've chosen mine. When ready, you can let it run with cron or similar.