SHA: fix wrong types in documentation (#37693)

Author: rfourquet

stdlib/SHA/docs/src/index.md

@@ -9,7 +9,7 @@ julia> bytes2hex(sha256("test"))
 "9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08"
 ```
 
-Each exported function (at the time of this writing, SHA-1, SHA-2 224, 256, 384 and 512, and SHA-3 224, 256, 384 and 512 functions are implemented) takes in either an `Array{UInt8}`, a `ByteString` or an `IO` object.  This makes it trivial to checksum a file:
+Each exported function (at the time of this writing, SHA-1, SHA-2 224, 256, 384 and 512, and SHA-3 224, 256, 384 and 512 functions are implemented) takes in either an `AbstractVector{UInt8}`, an `AbstractString` or an `IO` object.  This makes it trivial to checksum a file:
 
 ```julia
 shell> cat /tmp/test.txt