typo in nnx_basics.md

[notnot]

Replace
Since Modules hold their own state methods can be called directly without the no need for a separate apply method
by
Since Modules hold their own state methods can be called directly without the need for a separate apply method

[rajasekharporeddy]

Thanks for reporting. #4047 will fix this.

[notnot]

Found another one...

Replace
In practice this means that NNX programs can be express using imperative code
by
In practice this means that NNX programs can be expressed using imperative code

[rajasekharporeddy]

Thanks! #4050 addresses the typos in nnx_basics.md file.