Merge branch 'cms/ressources/geconomicus' into 'master'

Create Ressource “geconomicus”

See merge request !38

content/ressources/geconomicus.json

+{
+  "title": "Geconomicus",
+  "url": "https://geconomicus.glibre.org",
+  "description": "Jeu de simulation économique",
+  "image": "/uploads/gchange.svg",
+  "categories": [
+    "Tutoriel"
+  ]
+}
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