Normally someone (I think remcodes) updates my wasms, good of him, but we are currently using using a lot of cycles on our governance canister.
Please could you provide me with instructions to update this to the more efficient version that uses less cycles.
I think the most easiest way is using toolkit ic platform developed by remco only. Just register your neuron and SNS there and make proposals to upgrade sns to next version.
To add to @h1teshtr1path1’s suggestion, please refer to https://forum.dfinity.org/t/effortless-sns-updates for more details on how SNS upgrades will require less effort once you reach the version that adds a new type of proposals called AdvanceSnsTargetVersion.