[DOC] Minor addition for skipping connectivity matrices step (#150)

* Update connectivity_matrices.rst

Add documentation on how to skip this step by modifying recon yaml.

* Update connectivity_matrices.rst

fixed ``

docs/connectivity_matrices.rst

@@ -14,6 +14,9 @@ these pipelines and only look at those numbers.
 If you look at more than one weighting method be sure to adjust your statistics for the
 additional comparisons.
 
+To skip this step in your workflow, you can modify an existing recon pipeline by removing the 
+``action: connectivity`` section from the yaml file.
+
 .. _connectivity_atlases:
 
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