Apply suggestion to docs/installation_instructions.md

docs/installation_instructions.md

@@ -197,7 +197,7 @@ To start the installation process, run:
     $ python -m openappstack my-cluster install
 
 This will take approximately 5-10 minutes. It generates secrets that will be
-added to the clusters/my-cluster/secrets directory. If you ever need any
+added to the `clusters/my-cluster/secrets` directory. If you ever need any
 credentials after this installation, you can probably find them there. **Make
 sure this directory stays safe.** Feel free to encrypt it when you are not using
 the `openappstack` CLI tool.