Fix typo in README.

README

@@ -111,11 +111,11 @@ If you don't have a TLS certificate, Galène will generate a self-signed
 certificate automatically (and print a warning to the logs).  If you have
 a certificate, install it in the files `data/cert.pem` and `data/key.pem`:
 
-   ssh galene@server.example.org
-   sudo cp /etc/letsencrypt/live/server.example.org/fullchain.pem data/cert.pem
-   sudo cp /etc/letsencrypt/live/server.example.org/key.pem data/key.pem
-   sudo chown galene:galene data/*.pem
-   sudo chmod go-rw data/key.pem
+    ssh galene@server.example.org
+    sudo cp /etc/letsencrypt/live/server.example.org/fullchain.pem data/cert.pem
+    sudo cp /etc/letsencrypt/live/server.example.org/key.pem data/key.pem
+    sudo chown galene:galene data/*.pem
+    sudo chmod go-rw data/key.pem
     
 Now run the binary on the server: