[ruby/error_highlight] Suppress SyntaxError during RubyVM::AST.of

When the original source code is erb, RubyVM::AST.of does not work well.
https://github.com/rails/rails/issues/42678.

https://github.com/ruby/error_highlight/commit/b1572761a6

lib/error_highlight/core_ext.rb

@@ -29,7 +29,7 @@ module ErrorHighlight
 
         spot = ErrorHighlight.spot(node, **opts)
 
-      rescue Errno::ENOENT
+      rescue Errno::ENOENT, SyntaxError
       end
 
       if spot