> I'm still not unsure if I should include it as part of my answer when asked if I contributed to open source projects

I woud say yes, as long as you make sure you indicate the level clearly.

It's not landing a great new feature, but it shows you understand how Open Source works, you understand the value of the non-code parts of these projects, you can use the tools (I assume Git PR's), you can communicate well and work with others.