update qmmm-workshop version to 2026-02-23

Author: jimboid

workshop.json

@@ -99,7 +99,7 @@
       "longdesc": ""
     },
     "qmmm-workshop": {
-      "latest": "2026-02-16",
+      "latest": "2026-02-23",
       "name": "Introducing QM/MM",
       "category": "advanced",
       "shortdesc": "The course will introduce non-specialists to the use of combined quantum mechanics/molecular mechanics (QM/MM) methods for modelling enzyme-catalysed reaction mechanisms.",