Revert 1.3.0 bump (#1220)

* Revert "Bump VERSION string to 1.3.0"

This reverts commit f4e5ef5.

* Revert "Fix date in 1.3.0 release notes"

This reverts commit b9c15ee.

* Revert "Bump version to 1.3.0"

This reverts commit 321af15.

Author: sugmanue

CHANGELOG.md

@@ -1,24 +1,13 @@
 # Change Log
 
-## 1.3.0 (5/26/2026)
+## 1.2.0 (5/20/2026)
 > [!IMPORTANT]
 > All client modules are considered stable.  Some modules, including
 > server, CLI, and MCP, are still in developer-preview and may contain
 > bugs.  No guarantee is made about their API stability. Unstable
 > modules are marked with a warning in their `README.md` and with the
 > `@SmithyUnstableApi` annotation in their `package-info.java`.
 
-### Features
-
-- Improved Java HTTP client integration. ([#1206](https://github.com/smithy-lang/smithy-java/pull/1206))
-
-### Bug Fixes
-
-- Fixed NPE in JsonCodec.deserializeShape that suppresses deserialization errors. ([#1203](https://github.com/smithy-lang/smithy-java/pull/1203))
-- Moved version SPI into dedicated module to avoid classpath conflicts. ([#1213](https://github.com/smithy-lang/smithy-java/pull/1213))
-
-## 1.2.0 (5/20/2026)
-
 ### Features
 - Added custom constraints validation support for shapes. ([#1171](https://github.com/smithy-lang/smithy-java/pull/1171))
 - Added `McpServerInterceptor` with scoped hooks for MCP servers. ([#1174](https://github.com/smithy-lang/smithy-java/pull/1174))

VERSION

@@ -1 +1 @@
-1.3.0
+1.2.0