updated regex for SSH scanning to include more matches

[pUrGe12]

Proposed change

The current regex for SSH port matching is correct for matching banners from Ubuntu, Debian, FreeBSD SSH banners, however a lot of services have SSH banners that are like this

SSH-2.0-ad34f3baf

For example, running the following reveals the same for github.com,
nc -v github.com 22

Thus, to match these as well, I have updated the regex.

Type of change

• New core framework functionality
• Bugfix (non-breaking change which fixes an issue)
• Code refactoring without any functionality changes
• New or existing module/payload change
• Localization improvement
• Dependency upgrade
• Documentation improvement

Checklist

• I've followed the [contributing guidelines][contributing-guidelines]
• I've run make pre-commit, it didn't generate any changes
• I've run make test, all tests passed locally

Additional info

Future work includes creating NULL probes to capture banners of services that reveal it without any explicit probing (like SSH, FTP) along with the arbitrary probe that is currently defined.

[securestep9]

Thank you for your contribution @pUrGe12 !