Fix Lint/UnescapedBracketInRegexp cop failure with invalid multibyt…

…e escape

This is a followup to rubocop#13522.
The added regex raises a `ScannerError`, which doesn't inherit from `ParserError`.

changelog/fix_error_unescaped_bracket_scanner_error.md

@@ -0,0 +1 @@
+* [#13573](https://github.com/rubocop/rubocop/pull/13573): Fix `Lint/UnescapedBracketInRegexp` cop failure with invalid multibyte escape. ([@earlopain][])

lib/rubocop/cop/lint/unescaped_bracket_in_regexp.rb

@@ -58,7 +58,7 @@ def on_send(node)
             Regexp::Parser.parse(text.value)&.each_expression do |expr|
               detect_offenses(text, expr)
             end
-          rescue Regexp::Parser::ParserError
+          rescue Regexp::Parser::Error
             # Upon encountering an invalid regular expression,
             # we aim to proceed and identify any remaining potential offenses.
           end

spec/rubocop/cop/lint/unescaped_bracket_in_regexp_spec.rb

@@ -231,7 +231,7 @@
       end
 
       context 'invalid regular expressions' do
-        %w[+ * {42}].each do |invalid_regexp|
+        %w[+ * {42} \xff].each do |invalid_regexp|
           it "does not register an offense for single invalid `/#{invalid_regexp}/` regexp`" do
             expect_no_offenses(<<~RUBY)
               Regexp.#{method}("#{invalid_regexp}")