Fix OpenStruct use in exception_logger_spec
What does this MR do and why?
Fixes OpenStruct use in spec/lib/gitlab/grape_logging/loggers/exception_logger_spec.rb
since Ruby 3 discourages it.
MR acceptance checklist
This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.
-
I have evaluated the MR acceptance checklist for this MR.
Related to #344279
Edited by Igor Drozdov