docs: align codemeta citation date

HzaCode · HzaCode · commit 92f6c1dffb89 · 2026-05-09T19:15:07.000+08:00
diff --git a/codemeta.json b/codemeta.json
@@ -238,7 +238,7 @@
   "citation": [
     {
       "@type": "SoftwareSourceCode",
-      "datePublished": "2025",
+      "datePublished": "2026-05-09",
       "author": [
         {
           "@type": "Person",
