fix: Report shouldn't show source and target if none were configured

[olblak]

Signed-off-by: Olblak me@olblak.com

Report shouldn't show source and target if none were configured

Fix a small UI bug where we always display the word "source" and "target" in the report information.
For example running updatecli against the following manifest

scms:
  default:
    kind: git 
    spec:
      url: https://github.com/updatecli/updatecli.git

shows

=============================

REPORTS:


- EXAMPLE.YAML:
	Sources:
	Target:



Run Summary
===========
Pipeline(s) run:
  * Changed:	0
  * Failed:	0
  * Skipped:	1
  * Succeeded:	0
  * Total:	1

and should return

=============================

REPORTS:


- EXAMPLE.YAML:

Run Summary
===========
Pipeline(s) run:
  * Changed:	0
  * Failed:	0
  * Skipped:	1
  * Succeeded:	0
  * Total:	1

Test

To test this pull request, you can run updatecli using the manifest mentioned above

Additional Information

Tradeoff

Potential improvement

[dduportal]

👍