Update PackageValidationBaselineVersion to 13.3.3

[aspire-repo-bot]

This PR updates the PackageValidationBaselineVersion to 13.3.3 after the release.

This ensures that future builds validate API compatibility against this release.

Changes

• Updated src/Directory.Build.props with new baseline version

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Created automatically by the release workflow.

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[github-actions]

🚀 Dogfood this PR with:

⚠️ WARNING: Do not do this without first carefully reviewing the code of this PR to satisfy yourself it is safe.

curl -fsSL https://raw.githubusercontent.com/microsoft/aspire/main/eng/scripts/get-aspire-cli-pr.sh | bash -s -- 17138

Or

• Run remotely in PowerShell:

iex "& { $(irm https://raw.githubusercontent.com/microsoft/aspire/main/eng/scripts/get-aspire-cli-pr.ps1) } 17138"