fix typo in getting aquainted with rust docs
fix typo in getting aquainted with rust docs

rustbridge/neon,neon-bindings/neon,neon-bindings/neon,rustbridge/neon,dherman/nanny,dherman/nanny,dherman/nanny,dherman/nanny,rustbridge/neon,neon-bindings/neon,neon-bindings/neon,rustbridge/neon,rustbridge/neon,rustbridge/neon