Update doc/development/contributing.rst

Co-authored-by: Simon Cross <hodgestar+github@gmail.com>

doc/development/contributing.rst

@@ -122,7 +122,7 @@ QuTiP's approach is such:
 - Type hints are *hints* for the users.
 - Type hints can show the preferred usage over real implementation, for example:
   - ``Qobj.__mul__`` is typed to support product with scalar, not other ``Qobj``, for which ``__matmul__`` should is preferred.
-  - ``solver.options`` claim it return a dict not ``_SolverOptions`` (which is a subclass of dict).
+  - ``solver.options`` claims it return a dict not ``_SolverOptions`` (which is a subclass of dict).
 - Type alias are added to ``qutip.typing``.
 - `Any` can be used for input which type can be extended by plugin modules, (``qutip-cupy``, ``qutip-jax``, etc.)