Update stale README
-# Pulumi Fabric SDKs
+# Pulumi Language SDKs
-This directory contains the Pulumi Fabric SDKs, one for each supported language.
+This directory contains the Pulumi SDKs for all supported languages.
Please see the respective `README`s for information about installing and using these libraries:
-* [Node.js](`nodejs/README.md`)
+* [Node.js](./nodejs)
+* [Python](./python)
+* [Go](./go)
+The language providers work by implementing gRPC interfaces defined in [proto/](./proto/).
