[mlir][doc][transform] Fix link to documentation in tutorial. (NFC)

[ingomueller-net]

Trivial doc change --> self-accepting.

mlir/docs/Tutorials/transform/Ch1.md

^bb0(%arg0: !transform.any_op,
      %arg2: !transform.op<"linalg.elemwise_binary">):
   // The actual tiling transformation takes tile sizes as attributes.
   %loop, %tiled = transform.structured.tile_to_forall_op %arg1 tile_sizes [4, 32]
     : (!transform.op<"linalg.matmul") -> (!transform.any_op, !transform.any_op)
   transform.yield
 }
 ```
 
-The transformation returns two handles, as indicated in its [documentation](https://mlir.llvm.org/docs/Dialects/Transform/#transformstructuredtile_to_forall_op-mlirtransformtiletoforallop):
+The transformation returns two handles, as indicated in its [documentation](https://mlir.llvm.org/docs/Dialects/Transform/#transformstructuredtile_to_forall_op-transformtiletoforallop):
 
 *   A handle to the `scf.forall` “multi-for” loop around tensors.
 *   A handle to `linalg.generic` operating on the subset of the original data.
 
 Running this transformation with the same command as above expectedly produces the tiled code.
 
 ```mlir
 func.func @fc_relu(%arg0: tensor<512x512xf32>, %arg1: tensor<512x512xf32>, %arg2: tensor<512x512xf32>, %arg3: tensor<512x512xf32>) -> tensor<512x512xf32> {