GitHub Actions: The setup-go Action now enables caching by default

Enabling caching by default has demonstrated improved workflow performance, and can reduce build times by 20-40% for repositories with dependencies greater than 100 MB! This change has been made to the latest setup-go Action(V4). Developers no longer have to specify the cache: true parameter in their YAML file to obtain the benefits of caching. For more information on building, testing, and caching dependencies with Go, check out the docs here!