feat: add contributing section to the community heading (#405)

[boyney123]

Description

Following conversations over on #405, I thought this might be a nice addition to the website.

Somewhere people can click and start to explore how they can contribute to AsyncAPI projects.

At the moment this PR points to the Contributing GitHub Readme file that @alequetzalli has done.

I think the GitHub README file explains pretty nicely how to contribute, so maybe we can keep the context there but just point there from this link.

Anyway, let me know what you think @alequetzalli to the change 🙇

Sceenshot

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[boyney123]

Any thoughts on this one @derberg @alequetzalli? I think it's a nice touch, maybe copy needs reviewing, but dunno what you think?

[derberg]

might be good but now I see we are missing a link to https://github.com/asyncapi/community/blob/master/CONTRIBUTING.md in the place where you want to link

[boyney123]

might be good but now I see we are missing a link to asyncapi/community@master/CONTRIBUTING.md in the place where you want to link

At the moment I'm linking to this place

@derberg are you saying you would prefer to link to https://github.com/asyncapi/community/blob/master/CONTRIBUTING.md instead?

Or are you saying that the Org README is missing the link to https://github.com/asyncapi/community/blob/master/CONTRIBUTING.md?

[derberg]

I choose answer number 2? did I win? 😄

[boyney123]

I choose answer number 2? did I win? 😄

Think so 🤣

[derberg]

@boyney123 I think we can merge this one. I opened a fix for readme here asyncapi/.github#95

just update to master I guess, make sure all ready and I can merge

[boyney123]

All good to go @derberg 🚀