Update docs/DifferentiableProgrammingImplementation.md

Co-authored-by: Saleem Abdulrasool <[email protected]>

Author: philipturner

docs/DifferentiableProgrammingImplementation.md

@@ -127,7 +127,7 @@ The Swift compiler translates Swift source code into executable machine code. Be
 Here is a description of the main phases in compilation:[†](https://www.swift.org/swift-compiler/)
 - **Parsing**: The parser takes Swift source code and generates an abstract syntax tree (AST) without type information. Warnings and errors are produced for grammatical problems in source code.
 - **Type checking**: The type checker takes the parsed AST and transforms it into a fully type-checked form, performing type inference. Warnings and errors are produced for semantic problems in source code.
-- **SIL generation**: The Swift Intermediate Language (SIL) is a high-level intermediate language for Swift suitable for analysis and optimization. The SIL generation phase lowers the type-checked AST into “raw” SIL.
+- **SIL generation**: The Swift Intermediate Language (SIL) is a high-level intermediate language for Swift suitable for analysis and optimization. The SIL generation phase lowers the type-checked AST into ["raw" SIL](SIL.rst#silgen).
 - **SIL mandatory passes**: The SIL mandatory passes perform analyses that diagnose user errors and lower to "canonical" SIL, including data flow diagnostics and mandatory inlining.
 - **SIL optimizations passes**: The SIL optimization passes perform additional high-level optimizations to SIL.
 - **LLVM IR generation**: IR generation lowers SIL to LLVM IR. LLVM performs further optimizations and generates machine code.