remove net6.0/net7.0 since out of support

[WeihanLi]

No description provided.

[what-the-diff]

PR Summary

• Updated Target Frameworks in Document
  Modified the instructions within automate.md to reflect that our project now targets newer net8.0 and net9.0 frameworks, moving away from the older versions.

• Trimmed Older Frameworks in Project File
  The Husky.csproj file was revised to only include the more recent net9.0 and net8.0 frameworks. This means our project will no longer maintain compatibility with the now-obsolete net7.0 and net6.0 frameworks.

• Removed Redundant Property Group
  Erased a property group from Husky.csproj that contained settings for the older net6.0 and net7.0 frameworks. This reduces complexity and extraneous data in our project file.

• Upgraded Tool Installation Process
  Updated the script install_global.sh to install our tool, Husky, using the more recent net8.0 framework and a newer version 0.7.2. This provides improved tool performance and takes advantage of the latest features.

[alirezanet]

LGTM thanks 💐