fix: change ioutil to os

[iyear]

Signed-off-by: iyear ljyngup@gmail.com

Pre-Checklist

Note: please complete ALL items in the following checklist.

• I have read through the CONTRIBUTING.md documentation.
• My code has the necessary comments and documentation (if needed).
• I have added relevant tests

Description

The latest version of golangci-lint checks for deprecated ioutil
A file change was missed in #970

pkg/util/git/commit_test.go:4:2: SA1019: "io/ioutil" has been deprecated since Go 1.16: As of Go 1.16, the same functionality is now provided by package io or package os, and t
hose implementations should be preferred in new code. See the specific function documentation for details. (staticcheck)

Related Issues

N/A