fix(structure): no how-to-burning (#1181)

Author: verytactical

docs.json

@@ -311,7 +311,6 @@
                   "standard/tokens/jettons/overview",
                   "standard/tokens/jettons/how-it-works",
                   "standard/tokens/jettons/comparison",
-                  "standard/tokens/jettons/how-to-burning",
                   "standard/tokens/jettons/mintless/overview",
                   "standard/tokens/jettons/mint",
                   "standard/tokens/jettons/burn",