[Bug] Backward compatibility: Test-JSONChecksum

[TinaMor]

PR description

The command syntax for Test-JSON differs between PowerShell versions 7.2 (used in #35) and 7.4 (used to develop this module). For backward compatibility, we use the syntax common to both versions: Test-Json -Json -Schema instead of Test-Json -Path -SchemaFile .

Github issue/ discussion

Issue #35

Relevant links

• Test-Json PowerShell 7.2
• Test-Json PowerShell 7.4

Checklist

As part of our commitment to engineering excellence, before submitting this PR, please make sure:

• You've tested this code in both Desktop & Server environments and AMD & ARM64 enviroments (functional testing).
• You've added unit tests for new code.
• You've added/updated documentation in the cmdlet docs, command-reference.md and the modules help files.
• You've reviewed the PR/code best practices defined in the CONTRIBUTING.md.

In addition, after this PR has been reviewed, please agree to:

• If changes have been made to your PR in the process of addressing comments, please make sure to test again the final version in both AMD and ARM64 environments.
• Validate your changes have not introduced any regressions.

[iankingori]

LGTM