Update projects.md

projects.md

@@ -50,6 +50,10 @@ We will provide a set of topics in Bayesian optimization, and your job will be t
 
 The hackathon is also open to proposals for real-world optimization tasks in chemistry and materials science. This will involve providing beginner-friendly background knowledge on the impact of the application, existing solutions, and the science behind it. It will also involve providing rigorous details around the optimization problem, including search space (tunable parameters + constraints), objectives, experimental equipment, reagants, and standard operating procedures. These should be well-defined problems that *can* and *should* be tackled with Bayesian optimization, but have not yet.
 
+### General
+
+This category is for projects that don't fit into the special topics listed above, but generally fall within the topic of Bayesian optimization for the physical sciences.
+
 ## Project initialization
 
 As a teamleader, to initialize your project(s)[<sup>(?)</sup>][faq]{:title="Can I participate in multiple projects?"}, please follow these steps: