Fix table formatting in register snapshot repository

[kolchfa-aws]

Fix table formatting in register snapshot repository

Checklist

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[github-actions]

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[natebower]

LGTM

[opensearch-trigger-bot]

The backport to 3.0 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-3.0 3.0
# Navigate to the new working tree
pushd ../.worktrees/backport-3.0
# Create a new branch
git switch --create backport/backport-10102-to-3.0
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 7d105a9cb182a5ad9ff132bf722eae2f6065b408
# Push it to GitHub
git push --set-upstream origin backport/backport-10102-to-3.0
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/backport-3.0

Then, create a pull request where the base branch is 3.0 and the compare/head branch is backport/backport-10102-to-3.0.