Add Can destroy Anchor Outputs tx cap flag rule

tips/TIP-0054/tip-0054.md

@@ -634,7 +634,8 @@ and `governance transition`.
 - Governance transition:
   - A governance transition is identified by an unchanged `State Index` in next state. If there is no anchor output on
     the output side with a corresponding explicit `Anchor ID`, the anchor is being destroyed. The next state is the
-    empty state.
+    empty state. The transaction is invalid if an Anchor Output is burned and the _Can destroy Anchor Outputs_ flag in
+    the _Transaction Capabilities_ is **unset**.
   - The unlock must correspond to the `Address` of <i>Governor Address Unlock Condition</i>.
   - Governance transition must only change the following fields:
     - `Address` of <i>State Controller Address Unlock Condition</i>,