Should I provide an in-kind or cash match, if it is not required, to improve my odds of being awarded the grant?

Unless the solicitation specifically requires a match or indicates providing a match will be considered as part of the application review process, there is no advantage to voluntarily offering a match.  Furthermore, if your budget indicates you will be providing a match, you will typically be required to document the match in your financial reporting.

A more effective approach is to outline, in your program narrative, how you will be leveraging existing resources to support your project. Providing this type of information indicates that you are thoughtful about using existing resources and coordinating various initiatives. By providing this information in your program narrative, versus your budget, you avoid committing to the record-keeping associated with tracking a match.