Update README.md (#1556)

Signed-off-by: Bartlomiej Plotka <[email protected]>

README.md

@@ -24,12 +24,10 @@ CHANGELOG.md.
 
 Features that require breaking changes in the stable parts of the repository
 are being batched up and tracked in the [v2
-milestone](https://github.com/prometheus/client_golang/milestone/2). The v2
-development happens in a [separate
-branch](https://github.com/prometheus/client_golang/tree/dev-v2) for the time
-being. v2 releases off that branch will happen once sufficient stability is
-reached. In view of the widespread use of this repository, v1 and v2 will
-coexist for a while to enable a convenient transition.
+milestone](https://github.com/prometheus/client_golang/milestone/2), but plans for further development of v2 at the moment.
+
+> NOTE: The initial v2 attempt is in a [separate branch](https://github.com/prometheus/client_golang/tree/dev-v2). We also started
+experimenting on a new `prometheus.V2.*` APIs in [the 1.x's V2 struct](https://github.com/prometheus/client_golang/blob/main/prometheus/vnext.go#L23). Help wanted!
 
 ## Instrumenting applications