Fix a build error

Follow up rubocop/rubocop#11163.

This commit fixes the following build error:

```console
% bundle exec rspec spec/rubocop/cli/autocorrect_spec.rb
(snip)

Failures:

  1) RuboCop::CLI --autocorrect corrects `Style/HashExcept` with `TargetRubyVersion: 2.0`
     Got 2 failures from failure aggregation block.
     # ./spec/support/cli_spec_behavior.rb:25:in `block (2 levels) in <top (required)>'

     1.1) Failure/Error: expect(cli.run(['-a', '--only', 'Style/HashExcept'])).to eq(0)

            expected: 0
                 got: 1

            (compared using ==)
          # ./spec/rubocop/cli/autocorrect_spec.rb:54:in `block (2 levels) in <top (required)>'

     1.2) Failure/Error:
            expect(File.read('example.rb')).to eq(<<~RUBY)
              {foo: 1, bar: 2, baz: 3}.except(:bar)
            RUBY

            expected: "{foo: 1, bar: 2, baz: 3}.except(:bar)\n"
                 got: "{foo: 1, bar: 2, baz: 3}.reject {|k, v| k == :bar }\n"

            (compared using ==)

            Diff:
            @@ -1 +1 @@
            -{foo: 1, bar: 2, baz: 3}.except(:bar)
            +{foo: 1, bar: 2, baz: 3}.reject {|k, v| k == :bar }

          # ./spec/rubocop/cli/autocorrect_spec.rb:55:in `block (2 levels) in <top (required)>'

Finished in 0.28529 seconds (files took 1.12 seconds to load)
3 examples, 1 failure
```

Author: koic

spec/rubocop/cli/autocorrect_spec.rb

@@ -51,7 +51,7 @@
       {foo: 1, bar: 2, baz: 3}.reject {|k, v| k == :bar }
     RUBY
 
-    expect(cli.run(['-a', '--only', 'Style/HashExcept'])).to eq(0)
+    expect(cli.run(['-A', '--only', 'Style/HashExcept'])).to eq(0)
     expect(File.read('example.rb')).to eq(<<~RUBY)
       {foo: 1, bar: 2, baz: 3}.except(:bar)
     RUBY