Update README.md

[mhaack]

Description

Update README.md to add AEM Commerce Cloud Service link.

Related Issue

n/a

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [x] Documentation

Checklist:

• [x] I have signed the Adobe Open Source CLA.
• [ ] My change requires a change to the documentation.
• [x] I have updated the documentation accordingly.
• [ ] I have read the CONTRIBUTING document.
• [ ] I have added tests to cover my changes and the overall coverage did not decrease.
• [ ] All unit tests pass on CircleCi.
• [ ] I ran all tests locally and they pass.

[codecov[bot]]

Codecov Report

Merging #156 into master will not change coverage. The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #156   +/-   ##
=========================================
  Coverage     87.68%   87.68%           
  Complexity      523      523           
=========================================
  Files            38       38           
  Lines          1998     1998           
  Branches        316      316           
=========================================
  Hits           1752     1752           
  Misses          104      104           
  Partials        142      142           

Flag	Coverage Δ	Complexity Δ
integration	47.00% <ø> (ø)	259.00 <ø> (ø)
karma	96.55% <ø> (ø)	0.00 <ø> (ø)
unittests	84.02% <ø> (ø)	507.00 <ø> (ø)

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