chore: fix lint issues from go vet

[mvertes]

After merge of #3000, a few missing field names in struct literal were reported. Fix it. No functional change.

Contributors' checklist...

• [*] Added new tests, or not needed, or not feasible
• [*] Provided an example (e.g. screenshot) to aid review or the PR is self-explanatory
• [*] Updated the official documentation or not needed
• [*] No breaking changes were made, or a BREAKING CHANGE: xxx message was included in the description
• Added references to related issues and PRs
• Provided any useful hints for running manual tests

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 63.34%. Comparing base (9096ef4) to head (d886fbd).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3069      +/-   ##
==========================================
- Coverage   63.36%   63.34%   -0.02%     
==========================================
  Files         548      548              
  Lines       78601    78601              
==========================================
- Hits        49803    49789      -14     
- Misses      25444    25457      +13     
- Partials     3354     3355       +1     

Flag	Coverage Δ
contribs/gnodev	61.11% <ø> (ø)
contribs/gnofaucet	14.82% <ø> (-0.95%)	⬇️
gno.land	67.37% <ø> (ø)
gnovm	67.88% <ø> (ø)
misc/genstd	79.72% <ø> (ø)
tm2	62.44% <ø> (-0.02%)	⬇️

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[ltzmaxwell]

LGTM