update tensor augment assignment docs · Pull Request !1722 · MindSpore/docs

What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespaces from that line:

/kind feature

What does this PR do / why do we need it:
Update the document of augment assignment of multi dimensions tensor.

Which issue(s) this PR fixes:

类型	指派人员	状态
审查		已完成 (0/0)
测试		已完成 (0/0)

MindSpore / docs .gitee-modal { width: 500px !important; }