i18n: Mark mind map as beta

src/public/translations/en/translation.json

@@ -1327,7 +1327,7 @@
     "mermaid-diagram": "Mermaid Diagram",
     "canvas": "Canvas",
     "web-view": "Web View",
-    "mind-map": "Mind Map",
+    "mind-map": "Mind Map (Beta)",
     "file": "File",
     "image": "Image",
     "launcher": "Launcher",

src/public/translations/es/translation.json

@@ -1317,7 +1317,7 @@
     "mermaid-diagram": "Diagrama Mermaid",
     "canvas": "Lienzo",
     "web-view": "Vista Web",
-    "mind-map": "Mapa Mental",
+    "mind-map": "Mapa Mental (beta)",
     "file": "Archivo",
     "image": "Imagen",
     "launcher": "Lanzador",

src/public/translations/ro/translation.json

@@ -1291,7 +1291,7 @@
     "canvas": "Schiță",
     "code": "Cod sursă",
     "mermaid-diagram": "Diagramă Mermaid",
-    "mind-map": "Hartă mentală",
+    "mind-map": "Hartă mentală (beta)",
     "note-map": "Hartă notițe",
     "relation-map": "Hartă relații",
     "render-note": "Randare notiță",