README: Point to [email protected] (#2799)

Author: mxinden

.github/ISSUE_TEMPLATE/bug_report.md

@@ -5,7 +5,7 @@ about: Create a bug report for rust-libp2p.
 
 <!-- Thank you for filing a bug report! -->
 
-<!-- For security related issues please reach out to security@ipfs.io. Please do not file a public issue on GitHub. -->
+<!-- For security related issues please reach out to security@libp2p.io. Please do not file a public issue on GitHub. -->
 
 ## Summary
 

README.md

@@ -14,7 +14,7 @@ This repository is the central place for Rust development of the [libp2p](https:
 - The **[examples](examples)** folder contains small binaries showcasing the
   many protocols in this repository.
 
-- For **security related issues** please reach out to security@ipfs.io. Please
+- For **security related issues** please reach out to security@libp2p.io. Please
   do not file a public issue on GitHub.
 
 - To **report bugs, suggest improvements or request new features** please open a