Reflect removed return value of `register_output`#158

ConorOkus merged 1 commit intolightningdevkit:mainlightningdevkit/lightningdevkit.org:mainfrom

tnull:2022-08-update-filter-doc-for-removed-returntnull/lightningdevkit.org:2022-08-update-filter-doc-for-removed-returnCopy head branch name to clipboard