Merge pull request #780 from wdpypere/gallade2

add gallade update date

Author: boegel

mkdocs/docs/HPC/rhel9.md

@@ -137,7 +137,7 @@ using RHEL 8 to RHEL 9 one by one, following the schedule outlined below.
 | `skitty` | Monday 30 September 2024 | Tuesday 1 October 2024 |
 | `joltik` | Monday 21 October 2024 | Tuesday 22 October 2024 |
 | `accelgor` | Tuesday 26 November 2024 | |
-| `gallade` | December 2024 | |
+| `gallade` | Monday 9 December 2024 | |
 | `donphan` | February 2025 | |
 | `doduo` (default cluster) | February 2025 | |
 | login nodes switch | February 2025 | |