Possible inconsistencies in template's count function

[mrnfrancesco]

The template functionality to count the number of vulnerabilities by CVSS severity is based on CVSS base severity.

https://github.com/pwndoc/pwndoc/blob/203055b6af5ab58f3a170dccef23854291f40057/backend/src/lib/report-generator.js#L199

It should be related to Environmental severity to not create inconsistencies.