Now that we are using Focal for gitian builds, and have NSIS 3.0+ available (also in Guix), we can create installers that support unicode.
Unicode is only becoming the NSIS default beginning with the 3.07 release, so we need to set this attribute to get support.
Should close: #13817
Gitian builds:
0b8553615b6b4be5e4459e03796e700b30b5d198a7f184f27be6983ff901b5592 bitcoin-9086e0dd3c92-win-unsigned.tar.gz
1a6b024a5a68e0196e8e118168c918285e820f2d0ffe9c38db680580459da8bf3 bitcoin-9086e0dd3c92-win64-debug.zip
2ff4003d4f61127c707e44b5235eaf924b30351f20cde27e775131982a1b4cf92 bitcoin-9086e0dd3c92-win64-setup-unsigned.exe
31876bee55fa9ea99b91203975c13d0ad8a046b4b58068bde41c977fd1d12de13 bitcoin-9086e0dd3c92-win64.zip
4000f2778f8f166a89b4ab35f155156c1c34800be6e47d29b5308043c50128392 src/bitcoin-9086e0dd3c92.tar.gz
5d650a9b8f2dd1df777bf42439dfcbcf6bc358e30ec148b9992a18b39f76b1ecf bitcoin-core-win-22-res.yml