Bump tensorflow from 2.2.0 to 2.3.1 in /flask_server#2

dependabot[bot] wants to merge 1 commit intomasterenoreese/deep_serving:masterfrom

dependabot/pip/flask_server/tensorflow-2.3.1enoreese/deep_serving:dependabot/pip/flask_server/tensorflow-2.3.1Copy head branch name to clipboard