chore(deps): update PowerShell Test latest to v7.6.3

[github-actions]

Bumps tests/test-pwsh-latest.props from v7.6.2 to v7.6.3.

Auto-generated by a dependency updater.

Changelog

Commits between v7.6.2 and v7.6.3

• Update CHANGELOG for v7.6.3 (#27593)
• [release/v7.6.3] Update branch for release (#27583)
• [release/v7.6.3] Add PMC mappings for debian12 arm64 and debian13 arm64 (#27584)
• [release/v7.6.3] Skip Store Publish when No Channel Seleceted (#27573)
• [release/v7.6.3] Remove the unused Publish-NugetToMyGet command from packaging module (#27576)
• [release/v7.6.3] Verify Apple codesign immediately after ESRP signing (#27542)
• [release/v7.6.2] Remove unused step to clone Internal-PowerShellTeam-Tools repo in PMC publish pipeline (#27496)

[sentry]

Bug: The test-pwsh-7.6.props file is used in CI but is not managed by the dependency updater in update-deps.yml, causing it to become stale and inconsistent with the 'latest' version.
_{Severity: MEDIUM}

Suggested Fix

Add an entry for tests/test-pwsh-7.6.props to the update-deps.yml workflow file. This should include a version pattern like '^v7\.6\.\d+$' to ensure it automatically tracks the latest patch releases for the 7.6 minor version, similar to how versions 7.4 and 7.5 are managed.

Prompt for AI Agent

Review the code at the location below. A potential bug has been identified by an AI
agent. Verify if this is a real issue. If it is, propose a fix; if not, explain why it's
not valid.

Location: tests/test-pwsh-latest.props#L1-L2

Potential issue: The CI configuration in `build.yml` runs tests against PowerShell
version '7.6' using the `tests/test-pwsh-7.6.props` file. However, this file is not
configured for automatic updates in the `update-deps.yml` workflow. As a result, while
this pull request updates the 'latest' test matrix to PowerShell v7.6.3, the '7.6'
matrix remains on the older v7.6.2. This creates a maintenance gap and an inconsistency
where the two test configurations have diverged, potentially masking patch-specific
regressions or fixes in the 7.6 release line.

Also affects:

• build.yml
• update-deps.yml
• tests/test-pwsh-7.6.props

_{Did we get this right? 👍 / 👎 to inform future reviews.}