Update the stack trace regex for .NET Core/Java

Problem

The .NET and Java regexes match each other's patterns and are not specific enough.

Proposal

Updated regexes are available from 209.1 in https://gitlab.com/gitlab-org/security-products/dast-cwe-checks or https://gitlab.com/gitlab-org/security-products/dast-cwe-checks/-/merge_requests/82.