Correction in docs for airocean

[brsr]

As per Gray 1995 (cited in the docs), this is not an equal-area projection.

[rouault]

The backport to 9.8 failed:

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

stderr

The previous cherry-pick is now empty, possibly due to conflict resolution.
If you wish to commit it anyway, use:

    git commit --allow-empty

Otherwise, please use 'git cherry-pick --skip'

stdout

On branch backport-4798-to-9.8
You are currently cherry-picking commit 5d055e13.
  (all conflicts fixed: run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

nothing to commit, working tree clean

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-9.8 9.8
# Navigate to the new working tree
cd .worktrees/backport-9.8
# Create a new branch
git switch --create backport-4798-to-9.8
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick 5d055e1386e5f7daf317f3009a28532f60922cb2
# Push it to GitHub
git push --set-upstream origin backport-4798-to-9.8
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-9.8

Then, create a pull request where the base branch is 9.8 and the compare/head branch is backport-4798-to-9.8.