Update examples/ontology-from-excel/README.md

Co-authored-by: Jesper Friis <jesper-friis@users.noreply.github.com>

examples/ontology-from-excel/README.md

@@ -5,7 +5,7 @@ This workbook can then be used to generate a new ontology or update an already e
 
 Please refer to the (documentation)[https://emmo-repo.github.io/EMMOntoPy/latest/api_reference/ontopy/excelparser/] for full explanation of capabilities.
 
-The file onto.xlsx contains examples on how to do things correctly as well as incorrectly.
+The file `tool/onto.xlsx` contains examples on how to do things correctly as well as incorrectly.
 The tool will by default exit without generating the ontology if it detects concepts defined incorrectly.
 However, if the argument force is set to True, it will skip concepts that are erroneously defined
 and generate the ontology with what is availble.