Update missing changelogs (#185)

Author: aabmass

opentelemetry-propagator-gcp/CHANGELOG.md

@@ -2,6 +2,11 @@
 
 ## Unreleased
 
+- Add entry point for x-cloud-trace-context propagator
+  ([#183](https://github.com/GoogleCloudPlatform/opentelemetry-operations-python/pull/183))
+- Make the trace flags optional when parsing x-cloud-trace-context
+  ([#181](https://github.com/GoogleCloudPlatform/opentelemetry-operations-python/pull/181))
+
 ## Version 1.2.0
 
 Released 2022-04-05

opentelemetry-resourcedetector-gcp/CHANGELOG.md

@@ -2,6 +2,9 @@
 
 ## Unreleased
 
+- remove google-auth dependency for resource detection
+  ([#176](https://github.com/GoogleCloudPlatform/opentelemetry-operations-python/pull/176))
+
 ## Version 1.2.0a0
 
 Released 2022-04-05