Bump protobuf from 3.13.0 to 3.15.0 in /source/Python_FoveatedStreamingServerClient#12

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dependabot/pip/source/Python_FoveatedStreamingServerClient/protobuf-3.15.0Roboy/TSS20-Optimizing3DVideoMaterial:dependabot/pip/source/Python_FoveatedStreamingServerClient/protobuf-3.15.0Copy head branch name to clipboard