docs: add transaction_members to gitignore

.gitignore

@@ -78,6 +78,7 @@ docs/source/psbt_members.rst
 docs/source/script.rst
 docs/source/symmetric.rst
 docs/source/transaction.rst
+docs/source/transaction_members.rst
 docs/source/elements.rst
 docs/source/*_int.rst
 .idea/