Mark requires-talisman as a required parameter in schema and docs

Balatro Mod Manager appears to reject mods without this parameter, so should be required for the sake of compatibility with all versions of BMM

schema/meta.schema.json

@@ -43,6 +43,6 @@
       "type": "boolean"
     }
   },
-  "required": ["title", "requires-steamodded", "categories", "author", "repo", "downloadURL"]
+  "required": ["title", "requires-steamodded", "requires-talisman", "categories", "author", "repo", "downloadURL"]
 }