docs: Replace pnpx with pnpm dlx

[lucadalli]

Faced with the error below when trying to use pnpx on my Windows machine.

pnpx : The term 'pnpx' is not recognized as the name of a cmdlet, function, script file, or operable program.

pnpm dlx works fine. pnpm maker Zoltan says pnpx is being deprecated in favor of pnpm dlx.

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[aklinker1]

@lucadalli Can you replace the other instances of pnpx with pnpm dlx as well?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.55%. Comparing base (da92449) to head (2aee04c).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #527      +/-   ##
==========================================
- Coverage   86.84%   86.55%   -0.30%     
==========================================
  Files         111      111              
  Lines        8863     8864       +1     
  Branches      879      876       -3     
==========================================
- Hits         7697     7672      -25     
- Misses       1152     1178      +26     
  Partials       14       14              

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[aklinker1]

If you allow maintainers to contribute to your PR, I can add the rest of the changes.

https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/working-with-forks/allowing-changes-to-a-pull-request-branch-created-from-a-fork

[lucadalli]

@aklinker1 Sorry for the incomplete PR, I changed the rest.

Edit: Just an fyi, after switching to node 18.16.1 the original command pnpx wxt@latest init <project-name> works.
If you favor brevity, perhaps we can simply close this.

[aklinker1]

Nope, I'll keep this change. Thanks for updating the other references!

[btea]

After this modification, maybe the homepage video can also be updated? @aklinker1
https://wxt.dev/