Fix typo

docs/upload.md

@@ -9,7 +9,7 @@ A dataset refers to a collection of brains that have been processed and imaged i
   1. Click on the `NEW DATASET` button at the top right of the page.
   1. Fill out the title, description, and license. (The license option exists only because lincbrain.org is a clone of DANDI. It has no effect here, as lincbrain.org is a private repository.)
   1. Click on the `REGISTER DATASET` button to create the new dataset.
-1. Contribue to an existing dataset
+1. Contribute to an existing dataset
   1. Log into the [LINC Data Platform](lincbrain.org).
   1. Browse the existing datasets under the [SHARED DATASETS](https://lincbrain.org/dandiset) tab.
   1. Contact the `Owner` by email requesting that they add you as an `Owner` of the dataset.