doc: release: update eol for ltsv2 to 2025-01-26

Update the documentation page to reflect the latest LTSv2
release and tentative end-of-life (EOL) date.

Note: the actual EOL date is still dependant on the
official LTSv3 release date and may be subject to change.

Signed-off-by: Christopher Friedt <cfriedt@meta.com>