🐛 Broken links in `docs/concepts/enabled-elements.md`

[leonardosarmentocastro]

Steps To Reproduce

Navigate to docs/concepts/enabled-elements.md then, do one of the following:

• Click on enable() method invokation hyperlink.
• Click on loadImage() method invokation hyperlink.
• Click on displayImage() method invokation hyperlink.

The current behavior

It navigates to a 404 github page.

The expected behavior

It navigates to a page that actually exists, being it a .md (documentation) or .js (code sample) file.

[leonardosarmentocastro]

I still lack in deep knowledge to address the right hyperlinks, but might it be something like?

• enable(): https://github.com/cornerstonejs/cornerstone/blob/ca3a99228856cef1fff263c4407d0bb2a0079a49/src/enable.js#L42
• loadImage(): https://github.com/cornerstonejs/cornerstone/blob/650ba0c76475f765088cbf929d12a79dfc25a4f2/src/imageLoader.js#L67
• displayImage(): https://github.com/cornerstonejs/cornerstone/blob/650ba0c76475f765088cbf929d12a79dfc25a4f2/src/displayImage.js#L20