Fix typo in install.md

seperate -> separate

doc/docker/install.md

@@ -36,7 +36,7 @@ Getting Huginn up and running using docker is quick and painless once you have d
 
 Follow the [instructions on the docker hub registry](https://registry.hub.docker.com/r/huginn/huginn/) on how to configure Huginn using environment variables and linking the container to an external MySQL or PostgreSQL database.
 
-## Running each Huginn process in a seperate container
+## Running each Huginn process in a separate container
 
 With the `cantino/huginn-single-process` image you can easily run each process needed for Huginn in a separate container and scale them individually when needed. Have a look at the [Docker hub](https://hub.docker.com/r/huginn/huginn-single-process/) and the [documentation for the container](https://github.com/huginn/huginn/tree/master/docker/single-process)