Add GrimoireLab to Resources page

[GeorgLink]

On the "Resources" page, consider adding the open source software GrimoireLab, which is used by companies to analyze software development projects. The software is part of the Linux Foundation's CHAOSS project.

I can offer to author a pull request. I believe this file is the only one that needs editing.

[nathenharvey]

Thanks for the suggestion @GeorgLink!

Does GrimoireLab collect and visualize DORA’s software delivery metrics: the four key? Can you point to an example of it being used that way?

[GeorgLink]

I believe it does. But I'm not finding public references. Would it be acceptable for me to write a blog post demonstrating GrimoireLab's way of collecting and visualizing DORA's software delivery metrics?

[nathenharvey]

@GeorgLink yes, that would help!