Add some links from https://github.com/jermanuts/bad-opsec

[HerDudenessLena]

Affected section of the guide

https://anonymousplanet.org/guide.html#some-last-opsec-thoughts

Short description

Just adding some content from that link https://github.com/jermanuts/bad-opsec might be interesting

Research

No specific research but what is on that github is valid and checked

Required checks

• [X] This is not an opinion. It is fact. It is backed by [my own] research.
• [X] I agree to the PSA Code of Conduct.

[HerDudenessLena]

Added pull request #341