update: 更新文件 04.03_matrix_multiplication_operator_development_with_high_level

已合并

update: 更新文件 04.03_matrix_multiplication_operator_development_with_high_level_api.ipynb #536

update: 更新文件 04.03_matrix_multiplication_operator_development_with_high_level_api.ipynb #536

已合并

chenmingyu创建于 8月5日