update tensorflow version
Tensforflow version is currently fixed to tensorflow==2.8.2 but we want a newer version (tensorflow>=2.8.2). The version was fixed because this error occurred: https://github.com/googlecolab/colabtools/issues/2673
Tensforflow version is currently fixed to tensorflow==2.8.2 but we want a newer version (tensorflow>=2.8.2). The version was fixed because this error occurred: https://github.com/googlecolab/colabtools/issues/2673