gerrit-setup: Update rsa to ed25519

Since openssh 8.8 rsa signatures are disabled https://www.openssh.com/txt/release-8.8
Test: Ubuntu 22.04 rsa key does not give access to gerrit, Ed25519 - no access problems

Signed-off-by: Glukhov Mikhail <mikl@greenfil.ru>
Change-Id: I7fdb9cf003f90ebbc3adabf01324db9c6d891654
diff --git a/development/gerrit-setup.md b/development/gerrit-setup.md
index 84d798c..0d05f16 100644
--- a/development/gerrit-setup.md
+++ b/development/gerrit-setup.md
@@ -20,7 +20,7 @@
 
 
 ##### Setup SSH Keys
-Create keys: ```ssh-keygen -t rsa -C "your_email@your-domain"```
+Create keys: ```ssh-keygen -t ed25519 -C "your_email@your-domain"```
 * Recommended to use the defaults instead of picking your own directory/file
   names.