chore(UnorderedNonceBitMapUpgradeable): change Bitmap => BitMap

[huyhuynh3103]

Description

This pull request primarily updates test file names and references to ensure consistent naming for the UnorderedNonceBitMapUpgradeable contract, and updates the GitHub Actions workflow to use pinned, specific versions of dependencies for improved reliability. The most important changes are grouped below:

Test File and Contract Naming Consistency:

• Renamed test files and harness from UnorderedNonceBitmapUpgradeable to UnorderedNonceBitMapUpgradeable to match the contract's correct name and updated all related import statements and class names accordingly. [1] [2]

CI/CD Workflow Improvements:

• Updated the actions/checkout and foundry-rs/foundry-toolchain actions in .github/workflows/test.yml to use pinned commit SHAs instead of version tags, increasing build reproducibility and reliability.
• Removed the --sizes flag from the forge build command in the workflow, simplifying the build step.

Checklist

• I have clearly commented on all the main functions following the NatSpec Format
• The box that allows repo maintainers to update this PR is checked
• I tested locally to make sure this feature/fix works