docs) wrong function name, fixed

[s5unty]

The file encoding format is not uniform, not sure if there is a problem

% file docs/src/docs/types/*
docs/src/docs/types/array.md:            ASCII text
docs/src/docs/types/builtin-function.md: UTF-8 Unicode text
docs/src/docs/types/decorator.md:        UTF-8 Unicode text
docs/src/docs/types/function.md:         UTF-8 Unicode text
docs/src/docs/types/hash.md:             ASCII text
docs/src/docs/types/number.md:           ASCII text
docs/src/docs/types/string.md:           UTF-8 Unicode text

[odino]

Thanks!