Update mechanism to install a recent go version

Signed-off-by: Thomas Neidhart <thomas.neidhart@eclipse-foundation.org>

README.md

@@ -18,7 +18,7 @@ It is actively developed by the Eclipse Foundation and used to manage its numero
 To install and use the cli part of otterdog you have to install the following:
 
 * git (mandatory): install using `apt install git`
-* go (mandatory): install using `apt install golang-go`
+* go (mandatory): install using `apt install golang-1.23` or `snap install go`
 * otterdog (mandatory): install using `pipx install otterdog`
 * bitwarden cli tool (optional): install using `snap install bw`
 * pass cli tool (optional): install using `apt install pass`