x/website/_content/doc/tutorial: unnecessary cd into home directory

[Taz03]

Issue

The tutorial suggests making the project folder in the home directory:-

Ex:- https://go.dev/doc/tutorial/getting-started , https://go.dev/doc/tutorial/getting-started

Which can be misleading and can convey that a go project must be created in the home directory.

Suggested fix

1. Remove the step
2. Mark the step as optional
3. Add a note implying the project directory can be made in other directories as well

[dr2chase]

@golang/tools-team

[gopherbot]

Change https://go.dev/cl/594276 mentions this issue: _content/doc/tutorial: remove the unnecessary cd into home directory instruction