Make default tasks (bootRun) also available to gradle

[Cliffback]

With my Kotlin Spring Boot project, I wondered why gradle didn't show up in compiler.nvim, and turns out it just checks for registered task, while I was just using the default bootRun task, with no need for additional tasks, so I modified the task_match to also look for just tasks.

Hopefully this can help others with no specific gradle configs to get it working in Compiler.nvim without having to resort to create custom tasks.