skip if PO-Revision-Date is less than last CI created time

.po2tl.sh

@@ -20,6 +20,10 @@ for file in ./translations-*.po; do
     continue
   fi
 
+  if (( $(date -d $(awk '/PO-Revision-Date/{print $2}' ${file} +%s)) < $CI_PREV_BUILD_CREATED )); then
+    continue
+  fi
+
   msgfmt "$file" -o game.mo
   PATH=$(pwd)/renpy:${PATH} RENPY_DIR=$(pwd)/renpy python3 rttk-queerscriptors/mo2tl.py $(pwd)/game-source game.mo ${lang}
   zip "${lang}.zip" game-source/game/tl/${lang}/*