Add Security Talks Digest (#263)

Co-authored-by: ferhat elmas <elmas.ferhat@gmail.com>

README.md

@@ -480,7 +480,7 @@ Thanks to all [contributors](https://github.com/zudochkin/awesome-newsletters/gr
 - [Resilience Roundup](https://resilienceroundup.com). Learn from Resilence Engineering research without having to dig through long, academic papers.
 
 ## Security
-
+- [Security Talks Digest](https://talks.donsan.org). A newsletter, that aggregates content from the security conferences around the world and deliver them in form of a weekly report.
 - [Phishing Stories](https://phishingstories.beehiiv.com). The One Email CIOs & CISOs Actually Want Their Employees to Open.
 - [Crypto-Gram](https://www.schneier.com/crypto-gram/). A security-focused monthly newsletter curated by Bruce Schneier, one of the most famous security experts in the world.
 - [this week in security](https://twitter.us18.list-manage.com/subscribe?u=e1ad6038c994abec17dafb116&id=a2457dc8ad). a weekly tl;dr cybersecurity newsletter including news, the happy corner, your weekly cyber-cat, and more. It's sent every Sunday.