[servicecomb-docs] branch master updated: [SCB-2480] Add 2.8.0 change notes (#268)

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The following commit(s) were added to refs/heads/master by this push:
     new cfb2b1f  [SCB-2480] Add 2.8.0 change notes (#268)
cfb2b1f is described below

commit cfb2b1fa2ddcbede716247e87d28ba48120bf858
Author: ZhangJian He <sh...@gmail.com>
AuthorDate: Fri May 6 18:59:59 2022 +0800

    [SCB-2480] Add 2.8.0 change notes (#268)
---
 .../zh_CN/docs/featured-topics/upgrading/2_6_0T2_8_0.md      | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/java-chassis-reference/zh_CN/docs/featured-topics/upgrading/2_6_0T2_8_0.md b/java-chassis-reference/zh_CN/docs/featured-topics/upgrading/2_6_0T2_8_0.md
new file mode 100644
index 0000000..35d97c8
--- /dev/null
+++ b/java-chassis-reference/zh_CN/docs/featured-topics/upgrading/2_6_0T2_8_0.md
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+# 2.6.0 升级 2.8.0 指导
+
+## `netty`和`vert.x` 升级
+
+2.8.0目前使用了最新的 `netty` 和 `vert.x` 版本。
+
+* `servicecomb.rest.server.http2.maxHeaderListSize` 的缺省值由`Integer.MAX_VALUE` 改为 8192。
+  java-chassis的缺省值使用了 `vert.x`的缺省值。 如果业务需要依赖比较大的值，建议在配置文件设置适合应用场景的限制，不跟随这个缺省值。
+
+## `Spring` 和 `Spring Boot` 升级
+
+2.8.0目前使用了最新的 `Spring` 和 `Spring Boot` 版本。