.NET: Updating version for dotnet release 1.7.0

[alliscode]

Updating version for dotnet release 1.6.3

Contribution Checklist

• The code builds clean without any errors or warnings
• The PR follows the Contribution Guidelines
• All unit tests pass, and I have added new tests where possible
• Is this a breaking change? If yes, add "[BREAKING]" prefix to the title of the PR.

[Copilot]

Pull request overview

Updates the central .NET NuGet package versioning properties to prepare the 1.6.3 release.

Changes:

• Bump VersionPrefix from 1.6.2 to 1.6.3
• Update DateSuffix to 260526
• Update GitTag to 1.6.3

Show a summary per file

File	Description
dotnet/nuget/nuget-package.props	Updates centralized NuGet version/tag metadata used across .NET package builds for the 1.6.3 release.

Copilot's findings

• Files reviewed: 1/1 changed files
• Comments generated: 0

[github-actions]

Automated Code Review

Reviewers: 4 | Confidence: 84% | Result: All clear

Reviewed: Correctness, Security Reliability, Test Coverage, Design Approach

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Automated review by alliscode's agents