Update README.md

[codemilli]

Link is broken #122

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• [x] I have signed the Adobe CLA (required).

Topic

This is a pull request for:

• [x] A documentation contained within this repo.
• [ ] A sample contained within this repo.
• [ ] A new sample to be included in this repo.
• [ ] Something new that I have already discussed with Adobe in a GitHub issue. Issue link:

Versions

• [ ] CEP version(s) tested [must be 8.x+ for this repo]:
• [ ] Supported/tested CC app(s) and version(s):

Description of the pull request

fix broken link