Update dependency @vuepic/vue-datepicker to v12

Author: dependencyupdates[bot]

src/Frontend/package-lock.json

@@ -29,7 +29,7 @@
     "@tinyhttp/content-disposition": "2.2.2",
     "@vue-flow/controls": "1.1.3",
     "@vue-flow/core": "1.47.0",
-    "@vuepic/vue-datepicker": "11.0.3",
+    "@vuepic/vue-datepicker": "12.0.1",
     "@vueuse/core": "14.0.0",
     "bootstrap": "5.3.8",
     "codemirror": "6.0.2",