Add redirect for old V3 migration guides in release notes (#11241)

* Add redirect for old V3 migration guides in release notes

* Add newline

Author: LeeLenaleee

docs/.vuepress/redirects

@@ -1,3 +1,4 @@
 /charts/ /charts/line.html
 /general/ /general/data-structures.html
-/samples/ /samples/information.html
+/samples/ /samples/information.html
+/getting-started/v3-migration/ /migration/v3-migration.html