ioutil is deprecated

[Lodobo]

main.go uses a package called "io/ioutil", this package has become deprecated.

For more information: https://pkg.go.dev/io/[email protected]

[betapictoris]

Should be able to use Wiki CLI's updated saving method. See: https://github.com/BetaPictoris/wiki/commit/51fbaa1f8a1927e64c4843f9afb55cd98682446a.