fix issue with readme template
@@ -61,7 +61,7 @@ On Ubuntu, this will download and install our `.deb` package from [Cloudsmith](h
```
sudo apt-get install -y apt-transport-https curl
curl -sLf "https://dl.cloudsmith.io/public/cyberreboot/poseidon/cfg/gpg/gpg.F9E23875C98A1F72.key" | sudo apt-key add -
-sudo add-apt-repository "deb [arch=amd64] https://dl.cloudsmith.io/public/cyberreboot/poseidon/deb/ubuntu $(lsb_release -cs) main"
+sudo add-apt-repository "deb [arch=amd64] https://dl.cloudsmith.io/public/cyberreboot/poseidon/deb/ubuntu $$(lsb_release -cs) main"
sudo apt-get update
sudo apt-get install poseidon
```
