Cleanup doc reference of iree/samples/ --> samples/ (#8975)

Reflect https://github.com/google/iree/pull/8958
diff --git a/docs/developers/developing_iree/benchmarking.md b/docs/developers/developing_iree/benchmarking.md
index 49c8652..2a9a8dc 100644
--- a/docs/developers/developing_iree/benchmarking.md
+++ b/docs/developers/developing_iree/benchmarking.md
@@ -22,7 +22,7 @@
 $ bazel run //iree/tools:iree-compile -- \
   -iree-mlir-to-vm-bytecode-module \
   -iree-hal-target-backends=vmvx \
-  $PWD/iree/samples/models/simple_abs.mlir \
+  $PWD/samples/models/simple_abs.mlir \
   -o /tmp/module.fb
 ```