ci: publishing dart-3.1.2 failed

[RodrigoSMarques]

New Pull Request Checklist

• I am not disclosing a vulnerability.
• I am creating this PR in reference to an issue.

Issue Description

Remove dependency_overrides in flutter/pubspec.yaml

Related issue: #771

Approach

N/A

TODOs before merging

N/A

• Add tests
• Add changes to documentation (guides, repository pages, in-code descriptions)
• A changelog entry

[parse-github-assistant]

I will reformat the title to use the proper commit message syntax.

[parse-github-assistant]

Thanks for opening this pull request!

• 🎉 We are excited about your hands-on contribution!

[codecov]

Codecov Report

Merging #772 (54b5963) into master (af76c6b) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #772   +/-   ##
=======================================
  Coverage   10.26%   10.26%           
=======================================
  Files          49       49           
  Lines        2815     2815           
=======================================
  Hits          289      289           
  Misses       2526     2526           

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