Fix Style/HashEachMethods offense

Replace `keys.each` with hash iteration

```rb
MY_HASH = {
  first: '1',
  second: '2',
  third: '3'
}

%i[ips memory].each do |benchmark|
  Benchmark.send(benchmark) do |x|
    x.report("each_key") { MY_HASH.each_key { |k| MY_HASH[k] } }
    x.report("keys.each") { MY_HASH.keys.each { |k| MY_HASH[k] } }
    x.report("each") { MY_HASH.each { |k, v| v } }
    x.compare!
  end
end
```

```
IPS Comparison:
                each:  4283031.6 i/s
            each_key:  3683407.4 i/s - 1.16x  (± 0.00) slower
           keys.each:  3387425.1 i/s - 1.26x  (± 0.00) slower

Memory Comparison:
            each_key:          0 allocated
                each:          0 allocated - same
           keys.each:         40 allocated - Infx more
```

0 files changed, 0 insertions, 0 deletions