update last PR missing flag extension

[RedLeader962]

Description

Summary:

Add missing detail sed -i<extension> for portability linux/macOsx issue

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Checklist:

Code related

• I have made corresponding changes to the documentation (i.e.: function/class, script header, README.md)
• I have commented hard-to-understand code
• I have added tests that prove my fix is effective or that my feature works
• All tests pass locally with my changes (Check tests/README.md for local testing procedure)
• My commit messages follow the conventional commits specification. See commit_msg_reference.md in the repository root for details

PR creation related

• My pull request base ref branch is set to the dev branch (the build-system won't be triggered otherwise)
• My pull request branch is up-to-date with the dev branch (the build-system will reject it otherwise)

PR description related

• I have included a quick summary of the changes
• I have indicated the related issue's id with # <issue-id> if changes are of type fix

Note for repository admins

Release PR related

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• Keep PR in draft mode until all the release reviewers are ready to push the release.
• Once a PR from release -> main branch is created (not in draft mode), it triggers the build-system test
• On merge to the main branch, it triggers the semantic-release automation

[RedLeader962]

🎉 This PR is included in version 2.1.4 🎉

The release is available on GitHub release

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