message: Fix typo in SUPPORTED.md
diff: @@ -2,7 +2,7 @@ Supported Versions
  ---
  | Branch | Initialization | Active Support Until | Security Support Until |
  | ---------------------------------------------------------- | -------------- | -------------------- | ---------------------- |
  -| [v4.3.x](https://github.com/swoole/swoole-src/tree/v4.3.x) | 2019-2-7 | 2019-9-30 | 2020-12-31 |
  +| [v4.3.x](https://github.com/swoole/swoole-src/tree/v4.3.x) | 2019-2-7 | 2019-9-30 | 2019-12-31 |
  | [v4.4.x](https://github.com/swoole/swoole-src/tree/v4.4.x) | 2019-4-15 | 2020-4-30 | 2020-7-31 |
  | [v4.5.x](https://github.com/swoole/swoole-src/tree/master) | 2019-12-20 | 2020-12-31 | 2021-3-31 |
  