Update availability documentation in GraphExploreRequest

[georgewallace]

Per elastic/elasticsearch@487b217 the Graph API was removed from serverless scope . So the spec should be updated to reflect that.

[github-actions]

Following you can find the validation changes against the target branch for the APIs.

No changes detected.

You can validate these APIs yourself by using the make validate target.

[georgewallace]

@javanna per your PR, I am updating the ES OpenAPI spec to update our documentation.

[pquentin]

Thanks! LGTM.

Added a 9.1 backport for good measure even though this is only for serverless.

[github-actions]

The backport to 9.1 failed:

The process '/usr/bin/git' failed with exit code 128

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add .worktrees/backport-9.1 9.1
# Navigate to the new working tree
cd .worktrees/backport-9.1
# Create a new branch
git switch --create backport-5336-to-9.1
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 85867e30f190f96a7e49e7000ee44301ad4145a3
# Push it to GitHub
git push --set-upstream origin backport-5336-to-9.1
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-9.1

Then, create a pull request where the base branch is 9.1 and the compare/head branch is backport-5336-to-9.1.