Update CHANGELOG.md, generated code for v1.21.0

Author: cludden

.changes/v1.21.0.md

@@ -0,0 +1,7 @@
+# [1.21.0](https://github.com/cludden/protoc-gen-go-temporal/releases/tag/v1.21.0) - 2026-01-29
+
+### Changed
+
+* [#141](https://github.com/cludden/protoc-gen-go-temporal/pull/141) Return non-retryable error if unable to build workflow options (@khisakuni)
+
+

CHANGELOG.md

@@ -8,6 +8,14 @@ and is generated by [Changie](https://github.com/miniscruff/changie).
 
 
 
+# [1.21.0](https://github.com/cludden/protoc-gen-go-temporal/releases/tag/v1.21.0) - 2026-01-29
+
+### Changed
+
+* [#141](https://github.com/cludden/protoc-gen-go-temporal/pull/141) Return non-retryable error if unable to build workflow options (@khisakuni)
+
+
+
 # [1.20.0](https://github.com/cludden/protoc-gen-go-temporal/releases/tag/v1.20.0) - 2025-12-31
 
 ### Added

buf.lock

@@ -8,14 +8,14 @@ deps:
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