add eol for php 8.1

check_eol-data/program-languages.cfg

@@ -31,6 +31,7 @@ php:7.2:2020-11-30:Security support
 php:7.3:2021-12-06:Security support
 php:7.4:2022-11-28:Security support
 php:8.0:2023-11-26:Security support
+php:8.1:2024-11-24:Security support
 
 # ----------------------------------------------------------------------
 node:Node.js is a JavaScript runtime built on a V8 Javascript engine.