chore: upgrade nginx to 1.23

[swiatekm]

Description

Upgrade nginx to the most recent stable version. 1.21 has some vulnerabilities in the alpine image.

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Checklist

• Changelog updated

[sumo-backporter]

The backport to release-v2 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-release-v2 release-v2
# Navigate to the new working tree
cd .worktrees/backport-release-v2
# Create a new branch
git switch --create backport-2544-to-release-v2
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 d1499b2b19d83821dec32d50fb8197558747d13c
# Push it to GitHub
git push --set-upstream origin backport-2544-to-release-v2
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-release-v2

Then, create a pull request where the base branch is release-v2 and the compare/head branch is backport-2544-to-release-v2.