Update CONTRIBUTING.md

CONTRIBUTING.md

@@ -7,7 +7,7 @@ The commit name should be a summary of what you did. It should be accompanied by
 Each commit must have a name that starts with the following elements:
 
 * `[FEAT]` For a new feature
-* `[FILE]` For a new file
+* `[FILE]` For a new file or for an update of a file (not source code)
 * `[CPNT]` For a new component
 * `[UPDF]` For a feature update
 * `[UPDC]` For a feature component