Update CNPJ check digits exception message terminology

[juliolmuller]

Summary by CodeRabbit

• Bug Fixes
  • Refined an input-length error message to use clearer, more consistent wording.
  • Updated related validation messaging so length mismatches are described in terms of characters rather than digits.

[coderabbitai]

📝 Walkthrough

Walkthrough

The exception message in CnpjCheckDigitsInputLengthException changes the word "digits" to "characters". The test assertion and changelog entry are updated to match.

CNPJ Exception Message Wording

Layer / File(s)	Summary
Exception message, test, and changelog packages/cnpj-dv/src/Exceptions/CnpjCheckDigitsInputLengthException.php, packages/cnpj-dv/tests/specs/Exceptions.spec.php, packages/cnpj-dv/CHANGELOG.md	Exception message text changes from "digits" to "characters"; test expected string and changelog entry updated accordingly.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

A rabbit hopped through code one day,
Found "digits" where "characters" ought to stay.
One word swapped, the test agreed,
The changelog noted this tiny deed.
🐇 Small fixes matter too, indeed!

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title clearly matches the main change: updating the CNPJ check-digits exception message terminology.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/error-msg

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[juliolmuller]

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