Final cleanup edits

Author: crandmck

docs/trustmark-intro.md

@@ -7,7 +7,7 @@ TrustMark is an open-source universal watermarking system for images that:
 
 - Can encode, decode, and remove watermarks from images.
 - Works with arbitrary resolution images.
-- Has implementations in both Python (using PyTorch) and JavaScript (using ONNX).
+- Has implementations in Python (using PyTorch), [Rust](trustmark/rust/README.md), and [JavaScript](trustmark/js/README.md) (both using ONNX).
 
 :::info
 For full technical details and help getting started with TrustMark, see [TrustMark - Overview](trustmark/readme.md).