[Backport 1.26.x] Updating jai-ext to 1.1.31

[geoserver-bot]

Backport #1383
Authored by: @aaime

[geoserver-bot]

The backport to 1.26.x 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-1385-to-1.26.x
You are currently cherry-picking commit 079a3239.
  (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-1.26.x 1.26.x
# Navigate to the new working tree
cd .worktrees/backport-1.26.x
# Create a new branch
git switch --create backport-1385-to-1.26.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick 079a3239a56af8073a6b4e9fc1c7d740f349aaf5
# Push it to GitHub
git push --set-upstream origin backport-1385-to-1.26.x
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-1.26.x

Then, create a pull request where the base branch is 1.26.x and the compare/head branch is backport-1385-to-1.26.x.