Fix: typo in README code example

[Lax]

Using ImageResize: {} in config will fail, because this module is registered as imageResize(initial downcase).

window.Quill.register('modules/imageResize', ImageResize);

@kensnyder please merge, so to save time for whom copy&paste.

[taoqf]

I have merge all your pull requets. https://www.npmjs.com/package/@taoqf/quill-image-resize-module

[ishpagin]

Yesterday I spent the entire evening to find this reason. I entered the github to do PR, and here such already exists.

Good thing it was fixed. This will save many man hours. 👍

[Lax]

@kensnyder didn't merge any PRs for a long time