Missing comma in quoteSummary submodules list in readme

[junajan]

Fixing copy issue in readme.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 93.17%. Comparing base (2e4c0b4) to head (fa1a3db).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## devel #779 +/- ## ======================================= Coverage 93.17% 93.17% ======================================= Files 27 27 Lines 733 733 Branches 247 247 ======================================= Hits 683 683 Misses 50 50 ```

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[gadicc]

Ooh great, thanks! :sweat_smile: :pray: