Bump protobuf from 3.11.3 to 3.15.0 in /input/covid-19-x-ray-10000-images#18

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dependabot/pip/input/covid-19-x-ray-10000-images/protobuf-3.15.0Siddhant-K-code/COVID-19-RAPID-TESTER:dependabot/pip/input/covid-19-x-ray-10000-images/protobuf-3.15.0Copy head branch name to clipboard