fixed spelling mistake

docs/rtd/source/user_guide/Private-Clusters.md

@@ -70,7 +70,7 @@ sliderule.init("slideruleearth.io", organization="<your_organization>", ...)
 
 ### 5. Scaling and Provisioning a Private Cluster
 
-A private cluster is configured by the manager/owner of the cluster with a minimal number of nodes.  If the minimal number of nodes is insufficent for the processing the user wants to accomplish, the user can temporarily increase the number of nodes running for a user-defined amount of time, up to a maximum number of nodes set by the owner.  This is called scaling the cluster.  In most cases, the cluster is configured with the minimal number of nodes set to zero.  In this case, anyone wishing to use the cluster must first scale the cluster to at least one node before they are able to use it (we call this provisioning the cluster).
+A private cluster is configured by the manager/owner of the cluster with a minimal number of nodes.  If the minimal number of nodes is insufficient for the processing the user wants to accomplish, the user can temporarily increase the number of nodes running for a user-defined amount of time, up to a maximum number of nodes set by the owner.  This is called scaling the cluster.  In most cases, the cluster is configured with the minimal number of nodes set to zero.  In this case, anyone wishing to use the cluster must first scale the cluster to at least one node before they are able to use it (we call this provisioning the cluster).
 
 Scaling / provisioning a cluster can be accomplished a few different ways depending on the needs of the user and whether or not the cluster is at zero nodes (fully shutdown) or not.
 * If you want to guarantee that the cluster is up and that a minimal number of nodes is running before you do any data processing in your script, you can specify the desired number of nodes and a time to live in the `sliderule.init` call.  For example: