Remove Alpha notice (#657)

README.md

@@ -1,5 +1,3 @@
-⚠️ This software is very early in development and still in an alpha state with many quirks. If you use our ambitious project please share feedback.
-
 # Native Link
 
 [![OpenSSF Scorecard](https://api.securityscorecards.dev/projects/github.com/TraceMachina/nativelink/badge)](https://securityscorecards.dev/viewer/?uri=github.com/TraceMachina/nativelink)
@@ -8,7 +6,7 @@
 Native Link is an extremely (blazingly?) fast and efficient build cache and
 remote executor for systems that communicate using the [Remote execution
 protocol](https://github.com/bazelbuild/remote-apis/blob/main/build/bazel/remote/execution/v2/remote_execution.proto) such as [Bazel](https://bazel.build), [Buck2](https://buck2.build), [Goma](https://chromium.googlesource.com/infra/goma/client/) and
-[Reclient](https://github.com/bazelbuild/reclient).
+[Reclient](https://github.com/bazelbuild/reclient). NativeLink powers over one billion requests per month for customers using the system for their  production workloads.
 
 Supports Unix-based operating systems and Windows.