[mlir] Fix a doc link in LinalgBase.td

mlir/include/mlir/Dialect/Linalg/IR/LinalgBase.td

let description = [{
     The `linalg` dialect groups together a set of types, operations and
     transformations that are useful to implement a structured abstraction on
     buffers and tensors. These abstractions are useful for transformations and
     can lower to scalar load/store and other operations or to more general
     library calls.
 
     Additional [Linalg Dialect
     Documentation](https://mlir.llvm.org/docs/Dialects/Linalg) and a
-    [Rationale Document](https://mlir.llvm.org/docs/RationaleLinalgDialect) are
+    [Rationale
+    Document](https://mlir.llvm.org/docs/Rationale/RationaleLinalgDialect) are
     are also available and should be read first before going in the details of
     the op semantics.
   }];
 }
 
 // Whether a type is a RangeType.
 def LinalgIsRangeTypePred : CPred<"$_self.isa<RangeType>()">;
 def Range : DialectType<Linalg_Dialect, LinalgIsRangeTypePred, "range">;
 
 #endif // LINALG_BASE