Fix typos in comments/docs

[Boris Strelnikov]

Please fix the following typos in comments/docs:

Now all of them are being fixed via https://golangci-lint.run/usage/linters/#misspell after code generation in https://github.com/radianceteam/everscale-client-go

[Ekaterina Pantaz]

@risentveber Thank you! will be fixed in the next release