Direct people to GH discussions instead of Swift forums (#348)

* Direct people to GH discussions instead of Swift forums

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* Update README.md

Co-authored-by: Stephen Celis <[email protected]>

* Update README.md

Co-authored-by: Stephen Celis <[email protected]>

Author: mbrandonw

README.md

@@ -427,7 +427,7 @@ The latest documentation for the Composable Architecture APIs is available [here
 
 ## Help
 
-If you want to discuss the Composable Architecture or have a question about how to use it to solve a particular problem, ask around on [its Swift forum](https://forums.swift.org/c/related-projects/swift-composable-architecture).
+If you want to discuss the Composable Architecture or have a question about how to use it to solve a particular problem, you can start a topic in the [discussions](https://github.com/pointfreeco/swift-composable-architecture/discussions) tab of this repo, or ask around on [its Swift forum](https://forums.swift.org/c/related-projects/swift-composable-architecture).
 
 ## Credits and thanks