Add upgrade guide

[thom-at-redhat]

No description provided.

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
No data about Duplication

See analysis details on SonarCloud

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 39.66%. Comparing base (15c45db) to head (99e71cc).

@@            Coverage Diff             @@
##            devel     #963      +/-   ##
==========================================
+ Coverage   39.50%   39.66%   +0.15%     
==========================================
  Files          42       42              
  Lines        6606     6606              
==========================================
+ Hits         2610     2620      +10     
+ Misses       3797     3792       -5     
+ Partials      199      194       -5     

see 3 files with indirect coverage changes

[samccann]

Since there is no difference between upgrading and installing, you can probably just not have this guide. You already have a porting guide where y'all can put important changes from one release to another that users need to know about or do something about, so this upgrade guide is optional.

[AaronH88]

lgtm

[thom-at-redhat]

@samccann thank you for your comments, we will consider removing the upgrade guide in the future.