CHANGELOG.md in opentelemetry-sdk-1.0.0.rc1 vs CHANGELOG.md in opentelemetry-sdk-1.0.0.rc2

@@ -1,6 +1,23 @@
 # Release History: opentelemetry-sdk
 
+### v1.0.0.rc2 / 2021-06-23
+
+* BREAKING CHANGE: Remove optional parent_context from in_span [729](https://github.com/open-telemetry/opentelemetry-ruby/pull/729)
+* BREAKING CHANGE: Replace Time.now with Process.clock_gettime [717](https://github.com/open-telemetry/opentelemetry-ruby/pull/717)
+* BREAKING CHANGE: Refactor Baggage to remove Noop* [800](https://github.com/open-telemetry/opentelemetry-ruby/pull/800)
+* BREAKING CHANGE: Remove unnecessary readers from SDK Tracer [820](https://github.com/open-telemetry/opentelemetry-ruby/pull/820)
+  - Tracer no longer surfaces attribute readers for the name, version, or tracer_provider
+* BREAKING CHANGE: Total order constraint on span.status= [805](https://github.com/open-telemetry/opentelemetry-ruby/pull/805)
+
+* ADDED: Add Tracer.non_recording_span to API [799](https://github.com/open-telemetry/opentelemetry-ruby/pull/799)
+* ADDED: Add unnamed tracer warning message [830](https://github.com/open-telemetry/opentelemetry-ruby/pull/830)
+* ADDED: Allow disabling of install messages [831](https://github.com/open-telemetry/opentelemetry-ruby/pull/831)
+* FIXED: Rename cloud.zone to cloud.availability_zone [734](https://github.com/open-telemetry/opentelemetry-ruby/pull/734)
+* FIXED: Improve attribute error messages [742](https://github.com/open-telemetry/opentelemetry-ruby/pull/742)
+* FIXED: Support OTEL_SERVICE_NAME env var [806]https://github.com/open-telemetry/opentelemetry-ruby/pull/806
+* FIXED: Flakey tracer provider test
+
 ### v1.0.0.rc1 / 2021-05-21
 
 * BREAKING CHANGE: Remove optional parent_context from in_span
 * BREAKING CHANGE: Replace Time.now with Process.clock_gettime