Fix NFR upgrade tests

[sjberman]

Problem: The NFR upgrade tests were installing edge as the initial version of NGF, when it should be installing the most recent release of NGF.

Solution: Install the most recent release instead of edge when installing NGF for the upgrade test.

Testing: Verified that the upgrade test now runs properly.

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto main
• I will ensure my PR is targeting the main branch and pulling from my branch from my own fork

Release notes

If this PR introduces a change that affects users and needs to be mentioned in the release notes,
please add a brief note that summarizes the change.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.09%. Comparing base (2a78ff1) to head (07e3dd5).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4371      +/-   ##
==========================================
- Coverage   86.16%   86.09%   -0.07%     
==========================================
  Files         132      132              
  Lines       14343    14343              
  Branches       35       35              
==========================================
- Hits        12358    12348      -10     
- Misses       1783     1789       +6     
- Partials      202      206       +4     

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