doc: change `ExperimentalWarnings` to `ExperimentalWarning`

[akaustav]

Change Summary

This PR changes ExperimentalWarnings to ExperimentalWarning in the documentation for the latest version of NodeJS as of this writing - v21.6.1.

Why?

I am using the experimental JSON Modules feature within my NodeJS project. Although the JSON Modules feature works, whenever I execute my ES Module based JavaScript file, I would receive the following warning:

(node:30484) ExperimentalWarning: Importing JSON modules is an experimental feature and might change at any time
(Use `node --trace-warnings ...` to show where the warning was created)

After reading through the documentation under the section titled --disable-warning=code-or-type, I tried to suppress the ExperimentalWarning by changing the following start script within my package.json file:

{
  ...
  "scripts": {
    "start": "node --disable-warning=ExperimentalWarnings src/index.js"
  },
  ...
}

But I still received the aforementioned ExperimentalWarning within my console.

After re-reading the documentation (and referring other documentations - like this comment on issue #30810), instead of the plural version (ExperimentalWarnings), I tried the singular version (ExperimentalWarning):

  {
    ...
    "scripts": {
-     "start": "node --disable-warning=ExperimentalWarnings src/index.js"
+     "start": "node --disable-warning=ExperimentalWarning src/index.js"
    },
    ...
  }

And it worked! The warning was suppressed. Hence, this PR to address the confusion in the documentation.

[mertcanaltin]

you need to edit your first commit message

you can do it like this : doc: change ExperimentalWarnings to ExperimentalWarning

[akaustav]

you need to edit your first commit message

you can do it like this : doc: change ExperimentalWarnings to ExperimentalWarning

Sure, @mertcanaltin. Working on modifying the commit message and rebasing my PR now. Will post here when done.

[akaustav]

you need to edit your first commit message you can do it like this : doc: change ExperimentalWarnings to ExperimentalWarning

Sure, @mertcanaltin. Working on modifying the commit message and rebasing my PR now. Will post here when done.

@mertcanaltin - Just rebased and force pushed the commit with the modified commit message. Please let me know if the commit looks good.

PS. Notes for myself

Commands used:

git rebase -i HEAD~1
## reword commit
git push --force-with-lease

[nodejs-github-bot]

Landed in 123dc51c6ca4ed7e8c0aebb553a22a1474b27e2e