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

hopefully got everything right this time 😭

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

(adds #5977 )

testing

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

Checklist:

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