Update bulk.asciidoc change 'date' property to 'time' to match index creation

[SuperGingie]

In the code example, the index is created with a property called 'time' but the dataset has a field called 'date.' Updating the 'date' field to match the 'time' property of the index.

[JoshMock]

good catch! thanks for the contribution.

[JoshMock]

buildkite test this

[github-actions]

The backport to 8.12 failed:

The process '/usr/bin/git' failed with exit code 1

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-8.12 8.12
# Navigate to the new working tree
cd .worktrees/backport-8.12
# Create a new branch
git switch --create backport-2154-to-8.12
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 747171097dbee1c52f44d71f2eab52bd0a9e378e
# Push it to GitHub
git push --set-upstream origin backport-2154-to-8.12
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-8.12

Then, create a pull request where the base branch is 8.12 and the compare/head branch is backport-2154-to-8.12.