Upgrading from 12.3 to 12.11

[zaphod61]

I've inherited a postgresql 12.3 installation. It has 1 database in it.  I need 
to upgrade it to the newest version, which appears to be 12.11. Can I just 
download the installer for 1211 and run that to upgrade the product and still 
maintain access to the existing connections?Sent from my Verizon, Samsung 
Galaxy smartphone