To upgrade a single package in Ubuntu or your Ubuntu based distribution you can first check the repository to see if a newer version of the package is available. I want to upgrade to the latest version of Google Chrome.
Open your terminal and enter the following command
sudo apt-cache policy google-chrome-stable
As you can see from the terminal screenshot below, my installed version is 92.0.4515.107-1 but a newer version is available 93.0.4577.63-1
I then issue the following command to upgrade the google-chrome-stable package