Mark Rails/TimeZone as unsafe auto-correction from unsafe

Follow up to #575 (comment)

This PR marks `Rails/TimeZone` as unsafe auto-correction from unsafe.

Author: koic

changelog/change_mark_rails_time_zone_as_unsafe_auto_correction.md

@@ -0,0 +1 @@
+* [#576](https://github.com/rubocop/rubocop-rails/pull/576): Mark `Rails/TimeZone` as unsafe auto-correction from unsafe. ([@koic][])

config/default.yml

@@ -789,9 +789,9 @@ Rails/TimeZone:
   StyleGuide: 'https://rails.rubystyle.guide#time'
   Reference: 'http://danilenko.org/2012/7/6/rails_timezones'
   Enabled: true
-  Safe: false
+  SafeAutoCorrect: false
   VersionAdded: '0.30'
-  VersionChanged: '2.10'
+  VersionChanged: '2.13'
   # The value `strict` means that `Time` should be used with `zone`.
   # The value `flexible` allows usage of `in_time_zone` instead of `zone`.
   EnforcedStyle: flexible

docs/modules/ROOT/pages/cops_rails.adoc

@@ -4600,10 +4600,10 @@ SQL
 | Enabled by default | Safe | Supports autocorrection | Version Added | Version Changed
 
 | Enabled
-| No
+| Yes
 | Yes (Unsafe)
 | 0.30
-| 2.10
+| 2.13
 |===
 
 This cop checks for the use of Time methods without zone.