Documentation/dev-internal: update release managers with 3.3 release

Signed-off-by: Gyuho Lee <gyuhox@gmail.com>

Documentation/dev-internal/release.md

@@ -12,8 +12,8 @@ release and for ensuring the stability of the release branch.
 
 | Releases | Manager |
 | -------- | ------- |
-| 3.1 patch (post 3.1.0) | Joe Betz [@jpbetz](https://github.com/jpbetz) |
-| 3.2 patch (post 3.2.0) | Gyuho Lee [@gyuho](https://github.com/gyuho) |
+| 3.2 patch (post 3.2.0) | Joe Betz [@jpbetz](https://github.com/jpbetz) |
+| 3.3 patch (post 3.3.0) | Gyuho Lee [@gyuho](https://github.com/gyuho) |
 
 ## Prepare release