docs: fix typo in planner documentation (#864)

Co-authored-by: ishandhanani <82981111+ishandhanani@users.noreply.github.com>

docs/planner.md

@@ -86,7 +86,7 @@ We currently only support one backend:
 Circus is a Python program which can be used to monitor and control processes and sockets. Dynamo serve uses circus to start each node in a graph and monitors each subprocesses. We leverage a core feature to do this called `Watcher`. A `Watcher` is the target program that you would like to run (which in our case is `serve_dynamo.py`). When planner decides to scale up or down, it will either add or remove a watcher from the existing `circus`.
 
 > [!NOTE]
-> Although circus allows you to `increment` an existing watcher, it was not designed to allow variables to be passed in which does not allow us to schedule on a GPU. So instead we start a new watcher per process. When planner decdies to add or remove a worker, we have logic to handle this adding/removing and incrementing/decrementing the workers.
+> Although circus allows you to `increment` an existing watcher, it was not designed to allow variables to be passed in which does not allow us to schedule on a GPU. So instead we start a new watcher per process. When planner decides to add or remove a worker, we have logic to handle this adding/removing and incrementing/decrementing the workers.
 
 #### Statefile