[mlir][python] NFC - Fix stale path in doc

mlir/lib/Bindings/Python/mlir/dialects/linalg/opdsl/dump_oplib.py

 #!/usr/bin/which python
 # Command line tool to load an oplib module and dump all of the operations
 # it contains in some format.
 """Loads one or more modules containing op definitions and dumps them.
 
 The dump format can be:
 
 * `--dump_format=yaml` (default)
 * `--dump_format=repr`
 
 Positional arguments are interpreted as module names (optionally, relative to
 this module). Loose module files can be specified via `--file <filepath>`.
 
 Sample usage:
   # Dump the YAML op definitions for the core named ops (as in the dialect
   # source tree).
-  python -m mlir.tools.linalg_opdsl.dump_oplib .ops.core_named_ops
+  python -m mlir.dialects.linalg.opdsl.dump_oplib .ops.core_named_ops
 
 Note: YAML output is emitted in "document list" format with each operation
 as its own "document". Practically, this means that each operation (or group
 of composite ops) is emitted with a "---" preceding it, which can be useful
 for testing.
 """
 
 import argparse