Consider frozen_string_literal a safe autocorrect

This allows formatters, e.g Ruby LSP, to autocorrect the file. Without
this change, it's up to you to remember how to add those comments and,
in reality, they're quite safe to add to a greenfield product like this

.rubocop.yml

@@ -127,11 +127,9 @@ Style/Documentation:
 Style/EndlessMethod:
   Enabled: false
 
-Style/TrailingBodyOnMethodDefinition:
-  Enabled: false
-
-Style/TrailingMethodEndStatement:
-  Enabled: false
+Style/FrozenStringLiteralComment:
+  Enabled: true
+  SafeAutoCorrect: true
 
 Style/GuardClause:
   Enabled: false
@@ -163,8 +161,14 @@ Style/StringLiterals:
 Style/StringLiteralsInInterpolation:
   EnforcedStyle: double_quotes
 
+Style/TrailingBodyOnMethodDefinition:
+  Enabled: false
+
 Style/TrailingCommaInArrayLiteral:
   EnforcedStyleForMultiline: consistent_comma
 
 Style/TrailingCommaInHashLiteral:
   EnforcedStyleForMultiline: consistent_comma
+
+Style/TrailingMethodEndStatement:
+  Enabled: false