Update release notes

Author: JillRegan

internal/release/RELEASE-NOTES

@@ -4,3 +4,12 @@
 
 
 - **1Password Environment access:** The SDK can now read variables from a 1Password Environment.
+
+## IMPROVED
+
+- **Documentation:** The README now covers desktop app authentication and an updated list of supported functionality. Example code and comments are consistent with the other 1Password SDKs.
+- **Terms of Service:** The README now links the terms of service that apply to the 1Password APIs/SDKs.
+
+## FIXED
+
+- **CGO handling:** The SDK now builds with `CGO_ENABLED=0`. CGO is only required for Desktop App Integration.