fix gpg release workflow by removing vestigial fingerprint var

[grokspawn]

Vestigial GPG_FINGERPRINT variable in the deployment workflow, which isn't set because there is no import_gpg workflow, so the field evaluation fails.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 74.71%. Comparing base (08ab7fb) to head (8e9e355).
⚠️ Report is 150 commits behind head on main.

❗ There is a different number of reports uploaded between BASE (08ab7fb) and HEAD (8e9e355). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (08ab7fb)	HEAD (8e9e355)
	2	1

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #530       +/-   ##
===========================================
- Coverage   85.06%   74.71%   -10.35%     
===========================================
  Files          19       31       +12     
  Lines        1346     2037      +691     
===========================================
+ Hits         1145     1522      +377     
- Misses        125      433      +308     
- Partials       76       82        +6     

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[grokspawn]

/hold
this might be valid, but the gpg signing key has expired, and this won't resolve it.