Grammatically updated the tech docs (#45192)
Summary:
Small grammatical update to the [https://pytorch.org/docs/stable/tensors.html](url) docs.
**_update1_**
**_update2_**
Pull Request resolved: https://github.com/pytorch/pytorch/pull/45192
Reviewed By: bwasti
Differential Revision: D23877870
Pulled By: ezyang
fbshipit-source-id: 929ba3d479925b5132dbe87fad2da487408db7c7
