Add missing deprecation notices to go.mod files (#4104)

Author: pellared

CHANGELOG.md

@@ -31,8 +31,8 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 
 ### Deprecated
 
-- The `go.opentelemetry.io/contrib/instrumentation/github.com/astaxie/beego/otelbeego` module is deprecated. (#4092)
-- The `go.opentelemetry.io/contrib/instrumentation/github.com/go-kit/kit/otelkit` module is deprecated. (#4093)
+- The `go.opentelemetry.io/contrib/instrumentation/github.com/astaxie/beego/otelbeego` module is deprecated. (#4092, #4104)
+- The `go.opentelemetry.io/contrib/instrumentation/github.com/go-kit/kit/otelkit` module is deprecated. (#4093, #4104)
 
 ### Removed
 

instrumentation/github.com/astaxie/beego/otelbeego/go.mod

@@ -1,3 +1,7 @@
+// Deprecated: This module is no longer supported.
+// github.com/astaxie/beego is no longer maintained.
+// Use github.com/beego/beego/v2 together with its instrumentation
+// packages instead.
 module go.opentelemetry.io/contrib/instrumentation/github.com/astaxie/beego/otelbeego
 
 go 1.19

instrumentation/github.com/go-kit/kit/otelkit/go.mod

@@ -1,3 +1,4 @@
+// Deprecated: This module is no longer supported.
 module go.opentelemetry.io/contrib/instrumentation/github.com/go-kit/kit/otelkit
 
 go 1.19