Bump ScubaGear module version from v1.4.0 to v1.5.0

[github-actions]

🗣 Description

• This PR was create by a GitHub Action to bump ScubaGear's module version in the manifest and the README.
• Please fill out the rest of the template that the Action did not cover.

💭 Motivation and context

• Bump ScubaGear's module version to v1.5.0 before the next release

🧪 Testing

• A human should still check if the version bumping was successful by running ScubaGear.
• Check that the HTML report shows 1.5.0 in both the summary and individual reports
• Check the ScubaResults.json to ensure it embeds the correct version
• Run Invoke-Scuba -Version and ensure it reports 1.5.0
• Search documentation and code for signs of previous version number (Note: Sample report will be updated in separate PR)

✅ Pre-approval checklist

• This PR has an informative and human-readable title.
• PR targets the correct parent branch (e.g., main or release-name) for merge.
• Changes are limited to a single goal - eschew scope creep!
• Changes are sized such that they do not touch excessive number of files.
• All future TODOs are captured in issues, which are referenced in code comments.
• These code changes follow the ScubaGear content style guide.
• Related issues these changes resolve are linked preferably via closing keywords.
• All relevant type-of-change labels added.
• All relevant project fields are set.
• All relevant repo and/or project documentation updated to reflect these changes.
• Unit tests added/updated to cover PowerShell and Rego changes.
• Functional tests added/updated to cover PowerShell and Rego changes.
• All relevant functional tests passed.
• All automated checks (e.g., linting, static analysis, unit/smoke tests) passed.

✅ Pre-merge checklist

• PR passed smoke test check.

• Feature branch has been rebased against changes from parent branch, as needed

  Use Rebase branch button below or use this reference to rebase from the command line.

• Resolved all merge conflicts on branch

• Notified merge coordinator that PR is ready for merge via comment mention

• Demonstrate changes to the team for questions and comments.
  (Note: Only required for issues of size Medium or larger)

✅ Post-merge checklist

• Feature branch deleted after merge to clean up repository.
• Verified that all checks pass on parent branch (e.g., main or release-name) after merge.

[schrolla]

Confirmed version updates through execution showing that:

• Invoke-Scuba -Version shows 1.5.0
• HTML reports show 1.5.0
• ScubaResults.json shows ToolVersion 1.5.0
• Manifest version is 1.5.0
• Documentation shows 1.5.0
• Search of repository does not show 1.4.0 (except in sample reports to be updated in separate PR)
  Looks good.

[james-garriss]

Verified everything listed in the "Testing" section above.