chore(deps): update PowerShell Test v7.4 to v7.4.18

[github-actions]

Bumps tests/test-pwsh-7.4.props from v7.4.16 to v7.4.18.

Auto-generated by a dependency updater.

Changelog

Commits between v7.4.16 and v7.4.18

• Merge commit '40a4552c891b955bf2bb8ba4650a2b6fc29e5e40'
• Update changelog for v7.4.18 release (#27691)
• Merged PR 40641: Use the -sval parameter for light.exe to skip validation in CI
• Merged PR 40639: Ensure PSResourceGet version available is 1.2.0
• Merge commit 'bbf8d62cab60448565863b865d29125dbe6255ca'
• [release/v7.4.18] Update branch for release (#27690)
• Merged PR 40624: Validate CAB path before expansion (#167)
• [release/v7.4.18] Avoid calling credential provider for public feed for Wix (#27664)
• [release/v7.4.18] Update CI workflow to also target servicing-* branches (#27649)
• [release/v7.4.18] Separate NuGet publish into its own stage after pushing the git tag (#27648)
• Update 7.4 changelog for v7.4.17 (#27590)
• [release/v7.4.17] Update branch for release (#27580)
• [release/v7.4.17] Remove the unused Publish-NugetToMyGet command from packaging module (#27574)
• [release/v7.4.17] Skip Store Publish when No Channel Seleceted (#27571)
• [release/v7.4.17] Verify Apple codesign immediately after ESRP signing (#27540)
• [release/v7.4.16] Remove unused step that clones Internal-PowerShellTeam-Tools repo in PMC publish pipeline (#27497)