Update CONTRIBUTING.md

Author: victorianugnes

CONTRIBUTING.md

@@ -63,9 +63,9 @@ If you have never editted this ontology before, first follow a [general tutorial
 
 **Process**:
 
-1. Clone the repository (In case you are not an offical team member, create a fork first)
+1. Clone the repository (in case you are not an offical team member, create a fork first)
 1. Create new branch in git, for example `git checkout -b issue123`
-1. Open src/ontology/idpo-edit.owl in your favourite editor, i.e. [Protege](https://protege.stanford.edu/). **Careful:** double check you are editing the correct file. There are many ontology files in this repository, but only one _editors file_!
+1. Open src/ontology/idpo-edit.owl in your favourite editor, i.e. [Protege](https://protege.stanford.edu/). **Caution:** double check you are editing the correct file. There are many ontology files in this repository, but only one _editors file_!
 1. Perform your edit and save your changes
 1. Commit changes to branch
 1. Push changes upstream