fixed a minor typo in the nautilus readme

nautilus/README.md

@@ -9,7 +9,7 @@
 
 Simply copy the `mat2.py` file to `~/.local/share/nautilus-python/extensions`,
 and launch Nautilus; you should now have a "Remove metadata" item in the
-right-clic menu on supported files.
+right-click menu on supported files.
 
 Please note: This is not needed if using a distribution provided package. It
 only applies if installing from source.