Release v1.2.0 (open-telemetry#151)

* Release v1.2.0

Add a status to the Kubernetes Package Management Solutions section of
the configuration specification.

Update the changelog with all relevant changes and prepare for release
v1.2.0 of the project.

* Clarify the experimental specification added for Kube

* Update CHANGELOG.md

CHANGELOG.md

@@ -2,6 +2,8 @@
 
 ## [Unreleased]
 
+## [1.2.0] - 2021-11-15
+
 ### General
 
 #### Bug fixes
@@ -10,17 +12,26 @@
 
 ### Configuration
 
+#### Enhancements
+
+- Add experimental specification for the configuration for Kubernetes package
+  management solutions.
+
 #### Bug fixes
 
-- Properly specify configuration statuses for RUM and serverless.
+- Properly specify configuration statuses for RUM and serverless. These
+  sections of the configuration specification are not stable and are correctly
+  identified as such now.
 - Clarify requirement for RUM `beaconEndpoint` configuration value to be HTTPS
   only on systems that allow such enforcement.
 
 ### Versioning
 
 #### Enhancements
 
-- Add packaging specification information
+- Add information about packaging project versioning. This allows packaging
+  projects to be released as stable without the need for the project they
+  package to be stable.
 
 ## [1.1.0] - 2021-10-26
 
@@ -101,7 +112,8 @@
 - Primary focus is on Instrumentation Libraries for initial 1.0 release
 - Initial Collector specification defined
 
-[Unreleased]: https://github.com/signalfx/gdi-specification/compare/v1.1.0...HEAD
+[Unreleased]: https://github.com/signalfx/gdi-specification/compare/v1.2.0...HEAD
+[1.2.0]: https://github.com/signalfx/gdi-specification/releases/tag/v1.2.0
 [1.1.0]: https://github.com/signalfx/gdi-specification/releases/tag/v1.1.0
 [1.0.0]: https://github.com/signalfx/gdi-specification/releases/tag/v1.0.0
 [1.0.0-rc.3]: https://github.com/signalfx/gdi-specification/releases/tag/v1.0.0-rc.3

specification/configuration.md

@@ -92,6 +92,8 @@ environment variables:
 
 ### Kubernetes Package Management Solutions
 
+**Status**: [Experimental](../README.md#versioning-and-status-of-the-specification)
+
 While Kubernetes supports container technology that can be configured using
 environment variables, package management solutions such as Helm charts and
 Operators require YAML-based configuration. As a result, Kubernetes package