Update website for 5.4.0 release

Author: F21

site/_docs/go_history.md

@@ -28,7 +28,7 @@ For a full list of releases, see
 Downloads are available on the
 [downloads page]({{ site.baseurl }}/downloads/avatica-go.html).
 
-## <a href="https://github.com/apache/calcite-avatica-go/releases/tag/v5.4.0">5.4.0</a> / 2025-03-XX
+## <a href="https://github.com/apache/calcite-avatica-go/releases/tag/v5.4.0">5.4.0</a> / 2025-03-05
 {: #v5-4-0}
 
 Apache Calcite Avatica Go 5.4.0 includes dependency updates and various minor improvements.

site/_posts/2022-12-11-release-avatica-go-5.3.0.md site/_posts/2023-12-11-release-avatica-go-5.3.0.md

@@ -31,5 +31,4 @@ Apache Calcite Avatica Go 5.3.0 is a maintenance release of Avatica Go including
 This release supports Go 1.20 and 1.21, which are currently the versions supported and maintained by the
 Go team.
 
-The Calcite team recommends users of this package to upgrade to this version, where practical, as bugs causing panics
-have been resolved in this release.
+A detailed his

site/_posts/2025-03-05-release-avatica-go-5.4.0.md

@@ -0,0 +1,37 @@
+---
+layout: news_item
+date: "2025-03-05 08:30:00 +0000"
+author: francischuang
+version: 5.4.0
+categories: [release]
+tag: v5-4-0
+sha: f0d392b
+component: avatica-go
+---
+<!--
+{% comment %}
+Licensed to the Apache Software Foundation (ASF) under one or more
+contributor license agreements.  See the NOTICE file distributed with
+this work for additional information regarding copyright ownership.
+The ASF licenses this file to you under the Apache License, Version 2.0
+(the "License"); you may not use this file except in compliance with
+the License.  You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+{% endcomment %}
+-->
+
+Apache Calcite Avatica Go 5.4.0 includes dependency updates and various minor improvements.
+
+The Avatica protobuf messages have been recompiled to use the new [opaque API](https://go.dev/blog/protobuf-opaque). This
+change is internal and does not affect users of the Avatica Go client, but maintains best practices and follows the
+leading-edge of protobuf usage in Go.
+
+See the list of [bug fixes and new features]({{ site.baseurl }}/docs/go_history.html#v5-4-0)
+for more information.