Fix: typing in pontos/nvd

[Tacire]

What

Fixed typing in pontos/nvd (checked using poetry run mypy pontos/nvd)

Why

To prepare pontos for posible automatic typing checks in the future

References

DEVOPS-354

Checklist

• Tests

[codecov]

Codecov Report

Merging #673 (b45368b) into main (7380f7c) will decrease coverage by 0.27%.
The diff coverage is 93.75%.

❗ Current head b45368b differs from pull request most recent head 0a5c98e. Consider uploading reports for the commit 0a5c98e to get more accurate results

@@            Coverage Diff             @@
##             main     #673      +/-   ##
==========================================
- Coverage   89.71%   89.45%   -0.27%     
==========================================
  Files          82       79       -3     
  Lines        5389     4968     -421     
  Branches      759      665      -94     
==========================================
- Hits         4835     4444     -391     
+ Misses        389      368      -21     
+ Partials      165      156       -9     

Impacted Files	Coverage Δ
pontos/nvd/cpe/api.py	98.38% <92.30%> (-1.62%)	⬇️
pontos/nvd/cve/api.py	98.92% <93.33%> (-1.08%)	⬇️
pontos/nvd/api.py	96.36% <100.00%> (ø)

... and 26 files with indirect coverage changes

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because

[github-actions]

Conventional Commits Report

Type	Number
Bug Fixes	2

🚀 Conventional commits found.