docs: mark Node.js 23 as End-of-Life (#1094)

As of 2025-06-01, Node.js 23 has reached End-of-Life.

Refs: https://github.com/nodejs/Release/blob/main/schedule.json

Author: aduh95

README.md

@@ -6,7 +6,6 @@
 | :--:     | :---:               | :---:        | :---:          | :---:            | :---:             | :---:                     |
 | [20.x][] | **Maintenance**     | [Iron][]     | 2023-04-18     | 2023-10-24       | 2024-10-22        | 2026-04-30                |
 | [22.x][] | **LTS**             | [Jod][]      | 2024-04-24     | 2024-10-29       | 2025-10-21        | 2027-04-30                |
-| [23.x][] | **Maintenance**     |              | 2024-10-15     | -                | 2025-04-01        | 2025-06-01                |
 | [24.x][] | **Current**         |              | 2025-05-06     | 2025-10-28       | 2026-10-20        | 2028-04-30                |
 
 Dates are subject to change.
@@ -61,6 +60,7 @@ that are not End-of-Life.
 | [18.x][] | **End-of-Life** |[Hydrogen][]|   2022-04-19   |    2022-10-25    |       2023-10-18      |  2025-04-30 |
 | [19.x][] | **End-of-Life** |           |    2022-10-18   |         -        |                       |  2023-06-01 |
 | [21.x][] | **End-of-Life** |           |    2023-10-17   |         -        |       2024-04-01      |  2024-06-01 |
+| [23.x][] | **End-of-Life** |           |    2024-10-15   |         -        |       2025-04-01      |  2025-06-01 |
 
 ## Mandate