[DOC] Fix broken links

[knylander-grafana]

Fix broken links in the docs.

Fixes: #3439

[github-actions]

This PR must be merged before a backport PR will be created.

[github-actions]

The backport to release/v1.6 failed:

Validation Failed: "Could not resolve to a node with the global id of 'T_kwDOAG3Mbc4AczmP'."

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new branch
git switch --create backport-3440-to-release/v1.6 origin/release/v1.6
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x 1c3ce19c023aa51fbf02c0c06b100526aefe1562

When the conflicts are resolved, stage and commit the changes:

git add . && git cherry-pick --continue

If you have the GitHub CLI installed:

# Push the branch to GitHub:
git push --set-upstream origin backport-3440-to-release/v1.6
# Create the PR body template
PR_BODY=$(gh pr view 3440 --json body --template 'Backport 1c3ce19c023aa51fbf02c0c06b100526aefe1562 from #3440{{ "\n\n---\n\n" }}{{ index . "body" }}')
# Create the PR on GitHub
echo "${PR_BODY}" | gh pr create --title '[release/v1.6] [DOC] Fix broken links' --body-file - --label 'type/docs' --label 'backport' --base release/v1.6 --milestone release/v1.6 --web

Or, if you don't have the GitHub CLI installed (we recommend you install it!):

# Push the branch to GitHub:
git push --set-upstream origin backport-3440-to-release/v1.6

# Create a pull request where the `base` branch is `release/v1.6` and the `compare`/`head` branch is `backport-3440-to-release/v1.6`.

# Remove the local backport branch
git switch main
git branch -D backport-3440-to-release/v1.6