Update links to docs to link to new grafana docs

[mstoykov]

Description

Update links to link to new docs

Please fill in this template.

• Use a meaningful title for the Pull Request. Include the name of the jslib added/modified.
• Fill the description section of the Pull Request.
• Test the change in your code, and ensure the npm run test command succeeds.
• Run yarn run generate-homepage locally and verify the new homepage /lib/index.html file looks legit.

Select one of these and delete the others:

If adding a new jslib:

• The Pull Request creates a /lib/{jslib_name} folder.
• The Pull Request creates a /lib/{jslib_name}/{desired_version} folder.
• The /lib/{jslib_name}/{desired_version}/index.js file containing the jslib's code bundle exists.
• The Pull Request updates the supported.json file to contain an entry for the newly added jslib and its {desired_version}, as in the following example:

{
  "{jslib_name}": {
    // Available package versions
    "versions": [
      "{desired_version}"
    ],

    // (optional) Documentation's or repository's URL
    "docs-url": "{documentation_or_repository_url}",

    // (optional) As a default, the homepage will point to
    // a package's bundle's index.js. If your package's main
    // bundle name is different; set it here (see the AWS
    // package for instance).
    "bundle-filename": "{index.js}"
}

• Tests have been added to /tests/basic.js and /tests/testSuite.js to ensure that the added jslib is importable and runnable by k6.

If publishing a new version of an existing jslib:

• The Pull Request is labeled with the version bump label.
• The Pull Request adds a /lib/{jslib_name}/{desired_version} folder.
• The Pull Request adds a /lib/{jslib_name}/{desired_version}/index.js file containing the jslib's code bundle.
• The Pull Request updates the supported.json file to contain an entry for the newly added jslib version, as in the following example:

{
  "my-lib": [
    "1.0.2",
    // Use semantic versioning
    "{desired_version}"
  ]
}

• The Pull Request adds the relevant tests to the /tests/basic.js and /tests/testSuite.js files to ensure that the new version of the jslib is importable and runnable by k6.
• Merge the Pull Request once it is green. PRs adding new jslib versions do not require to get a review to be merged 🚀.

[mstoykov]

This librarary has a lin, but it actually just redirects to k6chjaijs docs. I guess it is the expect library from there ... extracted?

But this redirect isn't happening in the new docs and ... ot be honest is not very obvious that this is what it is to begin with.

I also didn't change k6chaijs to link to it's docs - it still links to its github, which I take it is on purpose?

cc @sniku @oleiade as the last people touching this.

[2Steaks]

LGTM 👍