feat(gatsby-plugin-checker): filter archived repositories

[dmarkiewicz]

It's my first open source pull request ever and I would like to thanks Gatsby folks for being so friendly and helpful.

Description

Filtering archived and deleted plugins

Related Issues

Related to #5211

[DSchau]

Nicely done! Thanks for adding this--left a small comment.

So glad you've found it a helpful community, and we're so glad to have you here and to have this contribution!

[sidharthachatterjee]

Thank you so much for this @dmarkiewicz

And welcome to the community! 🤗

[sidharthachatterjee]

🥇

[gatsbot]

Holy buckets, @dmarkiewicz — we just merged your PR to Gatsby! 💪💜

Gatsby is built by awesome people like you. Let us say “thanks” in two ways:

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Thanks again!