🐛 Do not fail on empty repositories

[azeemshaikh38]

What kind of change does this PR introduce?

Bug fix: Vuln check was failing for empty repositories.

(Is it a bug fix, feature, docs update, something else?)

• PR title follows the guidelines defined in our pull request documentation

What is the current behavior?

What is the new behavior (if this is a feature change)?**

• Tests for the changes have been added (for bug fixes/features)

Which issue(s) this PR fixes

Part of #1901

Special notes for your reviewer

Does this PR introduce a user-facing change?

For user-facing changes, please add a concise, human-readable release note to
the release-note

(In particular, describe what changes users might need to make in their
application as a result of this pull request.)

NONE

[github-actions]

Integration tests success for
[97d6a27]
(https://github.com/ossf/scorecard/actions/runs/2328594711)

[codecov]

Codecov Report

Merging #1914 (a0ca819) into main (b1ab7eb) will increase coverage by 3.06%.
The diff coverage is 90.00%.

@@            Coverage Diff             @@
##             main    #1914      +/-   ##
==========================================
+ Coverage   51.63%   54.70%   +3.06%     
==========================================
  Files          79       79              
  Lines        6774     6782       +8     
==========================================
+ Hits         3498     3710     +212     
+ Misses       3045     2835     -210     
- Partials      231      237       +6     

[naveensrinivasan]

Thanks

[github-actions]

Integration tests success for
[a0ca819]
(https://github.com/ossf/scorecard/actions/runs/2328958726)