Update RELEASE.md (#6511)

Maintainers would like an additional week to get the partition compactor changes in before the first release candidate for 1.19.

Signed-off-by: Charlie Le <[email protected]>

Author: CharlieTLe

RELEASE.md

@@ -34,7 +34,7 @@ Our goal is to provide a new minor release every 6 weeks. This is a new process
 | v1.16.0        | 2023-11-05                                 | Ben Ye (@yeya24)                            |
 | v1.17.0        | 2024-04-25                                 | Ben Ye (@yeya24)                            |
 | v1.18.0        | 2024-08-16                                 | Daniel Blando (@danielblando)               |
-| v1.19.0        | 2025-01-15                                 | Charlie Le (@charlietle)                    |
+| v1.19.0        | 2025-01-22                                 | Charlie Le (@charlietle)                    |
 
 ## Release shepherd responsibilities