Manual cherrypick required.
#38236 failed to apply on top of branch "release-1.15":
Applying: improve description
Using index info to reconstruct a base tree...
M istioctl/cmd/root.go
Falling back to patching base and 3-way merge...
Auto-merging istioctl/cmd/root.go
CONFLICT (content): Merge conflict in istioctl/cmd/root.go
error: Failed to merge in the changes.
hint: Use 'git am --show-current-patch=diff' to see the failed patch
Patch failed at 0001 improve description
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".