Update actions/setup-java action to v4

[mend-for-github-com]

This PR contains the following updates:

Package	Type	Update	Change
actions/setup-java	action	major	v3 -> v4

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Release Notes

actions/setup-java (actions/setup-java)

v4

Compare Source

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Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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• If you want to rebase/retry this PR, check this box

[opensearch-trigger-bot]

The backport to feature/agent_framework failed:

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

To backport manually, run these commands in your terminal:

# Navigate to the root of your repository
cd $(git rev-parse --show-toplevel)
# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add ../.worktrees/flow-framework/backport-feature/agent_framework feature/agent_framework
# Navigate to the new working tree
pushd ../.worktrees/flow-framework/backport-feature/agent_framework
# Create a new branch
git switch --create backport/backport-219-to-feature/agent_framework
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 51667329bb0187e027879bfffd6ba8bfd1d114ee
# Push it to GitHub
git push --set-upstream origin backport/backport-219-to-feature/agent_framework
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/flow-framework/backport-feature/agent_framework

Then, create a pull request where the base branch is feature/agent_framework and the compare/head branch is backport/backport-219-to-feature/agent_framework.