Backport of #26282 to release/v7.6

Triggered by @TravisEz13 on behalf of @daxian-dbw

Original CL Label: CL-BuildPackaging

/cc @PowerShell/powershell-maintainers

Impact

REQUIRED: Choose either Tooling Impact or Customer Impact (or both). At least one checkbox must be selected.

Tooling Impact

• Required tooling change
• Optional tooling change (include reasoning)

Updates PSReadLine package reference in build configuration. Required to ensure v7.6 release includes PSReadLine v2.4.5 with latest bug fixes and improvements.

Customer Impact

• Customer reported
• Found internally

Regression

REQUIRED: Check exactly one box.

• Yes
• No

This is not a regression.

Testing

Verified PSReadLine v2.4.5 package version in PowerShell.Common.props. Confirmed package update aligns with PSReadLine release notes. Change is straightforward version update following established pattern.

Risk

REQUIRED: Check exactly one box.

• High
• Medium
• Low

Low risk: This is a standard PSReadLine version update to v2.4.5. PSReadLine is a well-tested module and version updates follow established packaging patterns. No API changes or breaking modifications expected.