Update end-of-life date and notification treshold

LimeSurvey 7 is still not released, but they actually shortened the
lifespan of LimeSurvey 6 to 2026-04-03? What the heck? Everyone is
supposed to upgrade to LimeSurvey 7 right away with no testing
phase? That's a really, really weird support lifecycle...

Since we're already just two months away from that, shorten the EOL
notification grace period to two weeks before 2026-04-03. Weird...

Author: PhrozenByte

container.env

@@ -7,7 +7,7 @@ GIT_REPO="https://github.com/LimeSurvey/LimeSurvey.git"
 VERSION_PATTERN="6.*.*"
 
 # see https://www.limesurvey.org/manual/LimeSurvey_roadmap#Version_Support_Time_Frames
-ENDOFLIFE_AFTER="2026-04-30"
-ENDOFLIFE_TRESHOLD="-3 months"
+ENDOFLIFE_AFTER="2026-04-03"
+ENDOFLIFE_TRESHOLD="-14 days"
 
 BASE_IMAGE="ghcr.io/sgsgermany/php-fpm:v8.3"