Fix simple typo in angular.equals docs

[mjtamlyn]

JavasScript -> Javascript

[mary-poppins]

Thanks for the PR!

• Contributor signed CLA now or in the past
  • If you just signed, leave a comment here with your real name
• PR's commit messages follow the commit message format

If you need to make changes to your pull request, you can update the commit with git commit --amend.
Then, update the pull request with git push -f.

Thanks again for your help!

[mjtamlyn]

Signed CLA (Marc Tamlyn)

[mjtamlyn]

And I've now updated the commit format as well. Hope that's all as expected!