chore: added 1.4 release to the RELEASE_POLICY doc

Added 1.4 release to the RELEASE_POLICY doc

Signed-off-by: Egor Lazarchuk <yegorlz@amazon.co.uk>

Author: ShadowCurse

docs/RELEASE_POLICY.md

@@ -86,8 +86,9 @@ also be specifying the supported kernel versions.
 
 | Release | Release Date | Latest Patch | Min. end of support | Official end of Support        |
 | ------: | -----------: | -----------: | ------------------: | :----------------------------- |
+| v1.4    |   2023-07-20 | v1.4.0       |          2024-01-20 | Supported                      |
 | v1.3    |   2023-03-02 | v1.3.2       |          2023-09-02 | Supported                      |
-| v1.2    |   2022-11-30 | v1.2.1       |          2023-05-30 | Supported                      |
+| v1.2    |   2022-11-30 | v1.2.1       |          2023-05-30 | 2023-07-20 (v1.4 released)     |
 | v1.1    |   2022-05-06 | v1.1.4       |          2022-11-06 | 2023-03-02 (v1.3 released)     |
 | v1.0    |   2022-01-31 | v1.0.2       |          2022-07-31 | 2022-11-30 (v1.2 released)     |
 | v0.25   |   2021-03-13 | v0.25.2      |          2021-09-13 | 2022-03-13 (end of 1y support) |