chore: switch chat links to slack (#2782)

website/content/blog/deploy-preview-links.md

@@ -63,4 +63,4 @@ Support is coming soon for these two awesome backends! Stay tuned.
 ## Try it out!
 Deploy preview links are live in Netlify CMS 2.4.0. Please give them a try and let us know if you
 have any problems by [opening an issue](https://github.com/netlify/netlify-cms/issues/new) or
-reaching out in our [community chat on Gitter](https://gitter.im/netlify/netlifycms)!
+reaching out in our [community chat](https://netlifycms.org/chat)!

website/content/blog/implementing-a-jekyll-cms-in-3-days.md

@@ -434,7 +434,7 @@ That said, [we’re never done](https://www.dwolla.com/about/core-beliefs/). We
 - The Netlify CMS interface is simple and easy to learn for content editors
 - Branch deploys and previews are amazing
 - Netlify’s free plans give you the freedom to evaluate the offering before committing
-- There is an active and very helpful [community](https://gitter.im/netlify/NetlifyCMS) for Netlify CMS on Gitter
+- There is an active and very helpful [community chat](https://netlifycms.org/chat) for Netlify CMS
 - Netlify CMS is open source and welcomes contributions
 
 ### Cons

website/content/blog/netlify-cms-2-0-launches-with-bitbucket-support-and-a-new-monorepo-architecture.md

@@ -27,4 +27,4 @@ The other big change with 2.0 is the migration from a single codebase to a colle
 
 Upcoming feature releases will bring new image handling features and a number of improved APIs, adding even more possibilities to future CMS extensions.
 
-We’re always looking for more ideas and helping hands, so if you want to help build a smarter, safer, and more scalable CMS, we’d love your [contributions](/docs/contributor-guide/). Give us a shout on [Twitter](https://twitter.com/netlifycms) or [Gitter](https://github.com/netlify/netlify-cms/pull/525) if you have questions or ideas.
+We’re always looking for more ideas and helping hands, so if you want to help build a smarter, safer, and more scalable CMS, we’d love your [contributions](/docs/contributor-guide/). Give us a shout on [Twitter](https://twitter.com/netlifycms) or in our [community chat](/chat) if you have questions or ideas.

website/content/blog/netlify-cms-2-1-0-adds-external-media-support-with-uploadcare.md

@@ -54,4 +54,4 @@ As mentioned previously, we have more amazing providers coming soon! (Looking at
 
 We'll also be finalizing and documenting the media library integration API so developers can build their own integrations for services that aren't on our radar. S3 anybody?
 
-Questions or comments? Reach out [on Gitter](https://gitter.im/netlify/netlifycms).
+Questions or comments? Reach out in our [community chat](https://netlifycms.org/chat).

website/content/blog/netlify-cms-gatsby-plugin-4-0-0.md

@@ -130,4 +130,4 @@ module.exports = {
 }
 ```
 
-If you run into a problem or need help, [open an issue on GitHub](https://github.com/netlify/netlify-cms/issues/new/choose) or [chat with our community on Gitter](https://gitter.im/netlify/netlifycms)!
+If you run into a problem or need help, [open an issue on GitHub](https://github.com/netlify/netlify-cms/issues/new/choose) or [chat with our community](https://netlifycms.org/chat)!

website/content/blog/netlify-cms-now-supports-gitlab-as-a-backend.md

@@ -29,4 +29,4 @@ Lastly, one particularly exciting thing about using GitLab as your backend is th
 
 ## What’s next
 
-We’re already working toward [Bitbucket](https://github.com/netlify/netlify-cms/pull/525) support and will be releasing it as soon as possible! We’re also focused on the upcoming release of [Netlify CMS 2.0](https://github.com/netlify/netlify-cms/issues/1280), which will bring new image handling features and improvements, and improved APIs for better CMS extensions. We’re also looking for more ideas and helping hands, so if you’re keen to build a smarter, safer, and more scalable CMS, we’d love your contributions. Give us a shout on [Twitter](https://twitter.com/netlifycms) or Gitter if you have questions or ideas.
+We’re already working toward [Bitbucket](https://github.com/netlify/netlify-cms/pull/525) support and will be releasing it as soon as possible! We’re also focused on the upcoming release of [Netlify CMS 2.0](https://github.com/netlify/netlify-cms/issues/1280), which will bring new image handling features and improvements, and improved APIs for better CMS extensions. We’re also looking for more ideas and helping hands, so if you’re keen to build a smarter, safer, and more scalable CMS, we’d love your contributions. Give us a shout on [Twitter](https://twitter.com/netlifycms) or in [community chat](/chat) if you have questions or ideas.