Update README.md

[cskaust]

made grammar changes

Category

This change is exactly one of the following (please change [ ] to [x]) to indicate which:

• [ ] a bug fix (Fix #...)
• [ ] a new Ripper
• [ ] a refactoring
• [ ] a style change/fix
• [ ] a new feature

Description

Please add details about your change here.

Testing

Required verification:

• [ ] I've verified that there are no regressions in mvn test (there are no new failures or errors).
• [ ] I've verified that this change works as intended.
  • [ ] Downloads all relevant content.
  • [ ] Downloads content from multiple pages (as necessary or appropriate).
  • [ ] Saves content at reasonable file names (e.g. page titles or content IDs) to help easily browse downloaded content.
• [ ] I've verified that this change did not break existing functionality (especially in the Ripper I modified).

Optional but recommended:

• [ ] I've added a unit test to cover my change.

[soloturn]

@cskaust mind creating this in https://github.com/ripmeapp2/ripme ?