Fix NuGet pack CI step: build in Release mode and exclude Benchmarks

[paulirwin]

Summary

• Remove --no-build flag from pack command so it builds in Release mode
• Exclude Benchmarks project from NuGet packing by setting IsPackable=false

Fixes the CI failure from the previous NuGet pack PR.

Changes

• Updated .github/workflows/dotnet.yml to use dotnet pack -c Release instead of dotnet pack --no-build
• Added <IsPackable>false</IsPackable> to Benchmarks project file

Test plan

• Verify the pack step now builds in Release mode
• Verify Benchmarks project is excluded from NuGet packages
• Verify CI passes on a subsequent build

🤖 Generated with Claude Code

[Copilot]

Pull Request Overview

Fixes CI failure in NuGet pack step by ensuring Release mode build and excluding the Benchmarks project from packaging.

• Changed pack command to explicitly build in Release configuration instead of skipping build
• Excluded Benchmarks project from NuGet packaging

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
test/F23.StringSimilarity.Benchmarks/F23.StringSimilarity.Benchmarks.csproj	Added IsPackable property to prevent benchmark project from being packaged
.github/workflows/dotnet.yml	Modified pack command to build in Release mode instead of using pre-built artifacts

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}

[Copilot]

Pull Request Overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}