update v7.0 lts (#722)

Author: 1473371932

docs/zh/10-release-notes/02-release-timeline.md

@@ -6,7 +6,7 @@ permalink: /release-notes/release-timeline
 | Branch | Tag     | LTS   | Release        | End Of Life        |
 | ------ | ------- | ----- | -------------- | ------------------ |
 | main   | 7.1.0   |       | TBD            |                    |
-| v7.0   |         |       | 2025-06-19     | 2026-06-19         |
+| v7.0   |         | Y     | 2025-06-19     | 2026-06-19         |
 |        | 7.0.9   |       | 2025-06-11     |                    |
 |        | 7.0.8   |       | 2025-05-16     |                    |
 |        | 7.0.7   |       | 2025-04-29     |                    |