CONTRIBUTING.md: fix a few typos

CONTRIBUTING.md

@@ -47,9 +47,9 @@ Before you open your pull request, please consider the following:
   * This helps avoid merge conflicts.
 * Please ensure your change includes only the minimum changes needed to fix a single issue. These are easiest to review and tend to get merged more quickly. If the scope of your PR is wider than a single issue, you may be asked to reopen your PR as multiple separate PRs.
 * Are you fixing an issue from one of the issue trackers ([RipMeApp](https://github.com/RipMeApp/ripme/issues) or [4pr0n](https://github.com/4pr0n/ripme/issues))? If so, please ensure that you reference the issue you are fixing in your commit message so that it will be [automatically closed](https://help.github.com/articles/closing-issues-via-commit-messages/).
-* Please ensure you verifying that you did not break any functionality outside of your change or feature.
+* Please ensure you verify that you did not break any functionality outside of your change or feature
   * The CI might be broken, so please ensure that `mvn test` shows no new errors since before your change.
-  * Keep in mind each Ripper likely support multiple URL formats for each website, which have different content layouts (users, galleries, etc.)
+  * Keep in mind each Ripper likely supports multiple URL formats for each website, which have different content layouts (users, galleries, etc.)
   * We deal with live websites, so things might break while we aren't looking. Websites can change and content can be deleted at any time. Our code and/or tests may need to be rewritten to fix issues.
 * Please consider adding a test to check for regressions to the Ripper you added or the bug you fixed.
   * See e.g. src/test/java/com/rarchives/ripme/tst/ripper/rippers/ImgurRipperTest.java