added the ability to specify @ version when installing from url/file location

[insertokname]

added the ability to use the @ symbol when using scoop install with a url/file location

Description

Simple change to the regex that matches the name of the app to not require the whole string to be ending with .json. For example you can now do:

scoop install https://raw.githubusercontent.com/ScoopInstaller/Main/master/bucket/neovim.json@0.9.0

testing

This has been tested with all installation methods that have been mentioned in the scoop install --help

Checklist:

• [X] I have read the Contributing Guide.
• [X] I have ensured that I am targeting the develop branch.
• [X] I have updated the documentation accordingly.
• [ ] I have updated the tests accordingly.
• [X] I have added an entry in the CHANGELOG.

[niheaven]

Use a new local branch other than develop，and add a changelog entry

[insertokname]

should i make another pull request, or can i update this one to change the branch?

I already made the necessary changes to the CHANGELOG.