Fixes link in S3 documentation.
Fixes link in S3 documentation.

ford-prefect/rusoto,rusoto/rusoto,mattico/rusoto,DualSpark/rusoto,mattico/rusoto,rusoto/rusoto,DualSpark/rusoto,mthjones/rusoto,SecurityInsanity/rusoto,mattico/rusoto,DualSpark/rusoto,ford-prefect/rusoto,noggleboggle/rusoto,mthjones/rusoto,cmsd2/rusoto,indiv0/rusoto,rusoto/rusoto,DualSpark/rust-aws,DualSpark/rust-aws,SecurityInsanity/rusoto,DualSpark/rust-aws