Retract v1.1.1

The Go Report Card badge on the README poisoned the module cache for
v1.1.1. This commit retracts v1.1.1. Users can update to v1.1.2, which
is literally the same commit.

Author: akshayjshah

go.mod

@@ -2,6 +2,10 @@ module connectrpc.com/grpchealth
 
 go 1.19
 
+retract (
+	v1.1.1 // module cache poisoned, use v1.1.2
+)
+
 require (
 	connectrpc.com/connect v1.11.0
 	google.golang.org/protobuf v1.31.0