Update roadmap.rst

Collaboration

Author: RichardScottOZ

doc/roadmap.rst

@@ -31,7 +31,7 @@ learning workflow may look something like this:
 We are currently envisioning the project growing to support more complex
 extract-transform-load components commonly found in machine learning workflows
 that use multidimensional data. We note that many of the concepts in Xbatcher
-have been developed through colaborations in the `Pangeo Project Machine
+have been developed through collaborations in the `Pangeo Project Machine
 Learning Working Group <https://pangeo.io/meeting-notes.html>`_.
 
 Batch generation