doc: releases: update LTS3 EOL date

Based on change of LTS life time and life cycle decided by the TSC.

Signed-off-by: Anas Nashif <[email protected]>

Author: nashif

doc/releases/index.rst

@@ -62,7 +62,7 @@ Supported Releases
 +------------------------+----------------+---------------+
 | `Zephyr 4.0.0`_        | 2024-11-15     | 2025-07-18    |
 +------------------------+----------------+---------------+
-| `Zephyr 3.7.0 (LTS3)`_ | 2024-07-26     | 2027-01-26    |
+| `Zephyr 3.7.0 (LTS3)`_ | 2024-07-26     | 2029-07-27    |
 +------------------------+----------------+---------------+
 
 Previous LTS