Update 'Upgrade' to include fetching tags

[cruse1977]

Change Type

Correction

Area

Installation/upgrade

Proposed Changes

In Upgrading NetBox, we include the following in 'checking out an old release':

sudo git checkout v2.11.11

However to go from ex: 3.7.1 to 3.7.8; the installed version won't include tags, likewise there isn't a section for upgrading to none latest.

Should the above title change to 'Checking out a specific release' and the commands be:

sudo git fetch --tags
sudo git checkout v3.7.8

The above permitting upgrading in the current track as well as older versions

[jeffgdotorg]

Good capture @cruse1977. I can assign to you for PR if you like.