Fix broken links in docs

docs/source/contributing.rst

@@ -13,7 +13,7 @@ The rest of this document describes the technical details of getting set up to d
 Setting up your development environment
 ---------------------------------------
 
-We leverage `poetry <https://python-poetry.org/>` for packaging and dependency management.
+We leverage `poetry <https://python-poetry.org/>`_ for packaging and dependency management.
 After installing poetry, run the following commands to clone the repository, create a poetry managed virtual environment for development, and install dependencies.
 
 .. code:: bash
@@ -37,7 +37,7 @@ and build the documentation by changing to the ``docs/source`` directory where y
 
 The built documentation will then live in ``ucc/docs/source/_build/html``.
 
-We also use `pre-commit <https://pre-commit.com/>` to run code formatting and linting checks before each commit.
+We also use `pre-commit <https://pre-commit.com/>`_ to run code formatting and linting checks before each commit.
 To enable the pre-commit hooks, run
 
 .. code:: bash
@@ -80,7 +80,7 @@ When proposing a new transpiler pass, please include a detailed report containin
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 Once the prototype is validated, implement the new pass in the codebase.
-Documentation to guide you through this process is available in the `User Guide <user_guide>`_.
+Documentation to guide you through this process is available in the :doc:`user guide <user_guide>`.
 For more detailed information and examples, refer to the `Qiskit documentation <https://docs.quantum.ibm.com/guides/custom-transpiler-pass>`_.
 
 4. Clear Acceptance Criteria for Incorporation into default transpiler