Update changelog

Author: hc-github-team-tf-provider-devex

.changes/0.19.0.md

@@ -0,0 +1,10 @@
+## 0.19.0 (May 16, 2025)
+
+NOTES:
+
+* all: This Go module has been updated to Go 1.23 per the [Go support policy](https://go.dev/doc/devel/release#policy). It is recommended to review the [Go 1.23 release notes](https://go.dev/doc/go1.23) before upgrading. Any consumers building on earlier Go versions may experience errors. ([#291](https://github.com/hashicorp/terraform-plugin-mux/issues/291))
+
+FEATURES:
+
+* tf5muxserver+tf6muxserver+tf6to5server+tf5to6server: Upgraded protocols and added types to support the new resource identity feature ([#278](https://github.com/hashicorp/terraform-plugin-mux/issues/278))
+

.changes/unreleased/FEATURES-20250218-113243.yaml

@@ -1,3 +1,13 @@
+## 0.19.0 (May 16, 2025)
+
+NOTES:
+
+* all: This Go module has been updated to Go 1.23 per the [Go support policy](https://go.dev/doc/devel/release#policy). It is recommended to review the [Go 1.23 release notes](https://go.dev/doc/go1.23) before upgrading. Any consumers building on earlier Go versions may experience errors. ([#291](https://github.com/hashicorp/terraform-plugin-mux/issues/291))
+
+FEATURES:
+
+* tf5muxserver+tf6muxserver+tf6to5server+tf5to6server: Upgraded protocols and added types to support the new resource identity feature ([#278](https://github.com/hashicorp/terraform-plugin-mux/issues/278))
+
 ## 0.19.0-alpha.1 (March 18, 2025)
 
 NOTES: