Bump patch version to 9.4.1 on the release/9.4 branch

[Copilot]

This PR bumps the patch version from 9.4.0 to 9.4.1 on the release/9.4 branch to ensure that future builds produce version 9.4.1 instead of 9.4.0 for all Aspire packages and components.

Changes Made

The following files were updated following the same pattern established in PR #9963:

• eng/Versions.props: Changed PatchVersion from 0 to 1
• tests/Shared/RepoTesting/Aspire.RepoTesting.targets: Updated SDK version references from 9.4.0 to 9.4.1
• tests/Shared/RepoTesting/Directory.Packages.Helix.props: Updated all 71 Aspire package versions from 9.4.0 to 9.4.1 for Helix testing
• tests/Aspire.Cli.Tests/NuGet/NuGetPackageCacheTests.cs: Updated test version references
• tests/Aspire.Cli.Tests/Utils/CliUpdateNotificationServiceTests.cs: Updated CLI update notification test scenarios

Impact

After this change:

• All Aspire packages built from the release/9.4 branch will have version 9.4.1
• Test scenarios will correctly validate against the new patch version
• Helix testing infrastructure will use the updated package versions

The build completes successfully with these changes, confirming compatibility across the codebase.

Fixes #10889.

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