Update Elastic.Transport to 0.5.5

[flobernd]

Update Elastic.Transport to 0.5.5.

[github-actions]

The backport to serverless 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-serverless serverless
# Navigate to the new working tree
cd .worktrees/backport-serverless
# Create a new branch
git switch --create backport-8421-to-serverless
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick --mainline 1 b89de7a8017a6fc7401088b29b9f3d11f04686cf
# Push it to GitHub
git push --set-upstream origin backport-8421-to-serverless
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-serverless

Then, create a pull request where the base branch is serverless and the compare/head branch is backport-8421-to-serverless.

[github-actions]

The backport to 8.16 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-8.16 8.16
# Navigate to the new working tree
cd .worktrees/backport-8.16
# Create a new branch
git switch --create backport-8421-to-8.16
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick --mainline 1 b89de7a8017a6fc7401088b29b9f3d11f04686cf
# Push it to GitHub
git push --set-upstream origin backport-8421-to-8.16
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-8.16

Then, create a pull request where the base branch is 8.16 and the compare/head branch is backport-8421-to-8.16.