update docs

Signed-off-by: Nzengyawen <zengyawen1@huawei.com>

zh-cn/release-notes/api-change/v3.1-Release/changelog-v3.1-release.md

+# 3.1 release相对于3.1 beta变更详细说明
+
+### 针对color.json中颜色值，增加合法性校验
+
+针对color.json中颜色值，增加合法性校验，其校验规则如下：
+
+- 使用十六进制颜色码，格式如下：
+    - #rgb：red(0-f) green(0-f) blue(0-f)
+    - #argb：transparency(0-f) red(0-f) green(0-f) blue(0-f)
+    - #rrggbb： red(00-ff) green(00-ff) blue(00-ff)
+    - #aarrggbb： transparency(00-ff) red(00-ff) green(00-ff) blue(00-ff)
+- 使用$引用应用中已定义的资源，格式如下：
+    - $color:xxx
+
+**变更影响**
+
+不符合上述校验规则，将在编译时报错。
+
+**关键的接口/组件变更**
+
+无
\ No newline at end of file

zh-cn/release-notes/api-change/v3.1-Release/readme.md

@@ -4,7 +4,7 @@
 
 - [JS API差异报告](js-apidiff-v3.1-release.md)
 - [Native API差异报告](native-apidiff-v3.1-release.md)
+- [3.1 release相对于3.1 beta变更详细说明](changelog-v3.1-release.md)
 
 此外，本次还发布了OpenHarmony 3.2 Canary （API Version 9 Canary）版本：
 [JS API差异报告（API Version 9 Canary）](js-apidiff-v3.2-canary.md)
-

zh-cn/website.md

@@ -155,6 +155,7 @@
         - [资源调度](release-notes/api-change/v3.1-Release/js-apidiff-resource-scheduler_api-9-canary.md)
         - [窗口管理](release-notes/api-change/v3.1-Release/js-apidiff-window_api-9-canary.md)
       - [Native API差异报告](release-notes/api-change/v3.1-Release/native-apidiff-v3.1-release.md)
+      - [3.1 release相对于3.1 beta变更详细说明](release-notes/api-change/v3.1-Release/changelog-v3.1-release.md)
     - OpenHarmony 3.1 Beta
       - [JS API差异报告](release-notes/api-change/v3.1-beta/js-apidiff-v3.1-beta.md)
       - [Native API差异报告](release-notes/api-change/v3.1-beta/native-apidiff-v3.1-beta.md)