Add LinkedEarth org as grafana viewers

[pnasrat]

Ref: #2557
Ref: https://2i2c.freshdesk.com/a/tickets/723

[consideRatio]

The github org is case sensitive still i think in the chart version we use, but there is a fix merged in main branch for grafana the software already.

Looks good to me, but beware of case sensitivity!

[pnasrat]

@consideRatio thanks I ran the below to check what GH API returns

gh api \
∙   -H "Accept: application/vnd.github+json" \
  -H "X-GitHub-Api-Version: 2022-11-28" \
  /orgs/LinkedEarth
{
  "login": "LinkedEarth",

[github-actions]

🎉🎉🎉🎉

Monitor the deployment of the hubs here 👉 https://github.com/2i2c-org/infrastructure/actions/runs/5025046957