minor fix

Former-commit-id: e8362dc8550fc1e620340faca632f8b70c37013c

cli/README.MD

@@ -34,7 +34,7 @@ SingleFile can be launched from the command line by running it into a (headless)
 
   `chmod +x single-file`
 
-- To use Firefox instead of Chrome, you must download the [Selenium WebDriver](https://www.npmjs.com/package/selenium-webdriver) component (i.e. `geckodriver` for Firefox).  Make sure it can be found through the `PATH` environment variable or the `cli` folder. Otherwise you will need to set the `--web-driver-executable-path` option to help SingleFile locating the executable.
+- To use Firefox instead of Chrome, you must download the [Selenium WebDriver](https://www.npmjs.com/package/selenium-webdriver) component (i.e. `geckodriver` for Firefox).  Make sure it can be found through the `PATH` environment variable or the `cli` folder. Otherwise you will need to set the `--web-driver-executable-path` option to help WebDriver locating the executable.
 
 ## Run