Update CHANGELOG for 1.6.0-beta.2 release for non-core components (#4995)

Author: utpilla

src/OpenTelemetry.Instrumentation.AspNetCore/CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+## 1.6.0-beta.2
+
+Released 2023-Oct-26
+
 * Introduced a new metric, `http.server.request.duration` measured in seconds.
   The OTel SDK (starting with version 1.6.0)
   [applies custom histogram buckets](https://github.com/open-telemetry/opentelemetry-dotnet/pull/4820)

src/OpenTelemetry.Instrumentation.GrpcNetClient/CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+## 1.6.0-beta.2
+
+Released 2023-Oct-26
+
 ## 1.5.1-beta.1
 
 Released 2023-Jul-20

src/OpenTelemetry.Instrumentation.Http/CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+## 1.6.0-beta.2
+
+Released 2023-Oct-26
+
 * Introduced a new metric for `HttpClient`, `http.client.request.duration`
   measured in seconds. The OTel SDK (starting with version 1.6.0)
   [applies custom histogram buckets](https://github.com/open-telemetry/opentelemetry-dotnet/pull/4820)

src/OpenTelemetry.Instrumentation.SqlClient/CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+## 1.6.0-beta.2
+
+Released 2023-Oct-26
+
 ## 1.5.1-beta.1
 
 Released 2023-Jul-20

src/OpenTelemetry.Shims.OpenTracing/CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+## 1.6.0-beta.2
+
+Released 2023-Oct-26
+
 * Remove obsolete `TracerShim(Tracer, TextMapPropagator)` constructor.
   Use `TracerShim(TracerProvider)`
   or `TracerShim(TracerProvider, TextMapPropagator)` constructors.