Update overview.rst

Replaced single backticks with double

docs/userguide/overview.rst

@@ -195,7 +195,7 @@ Common Errors
 
 Here are some common errors you might encounter during installation and how to fix them:
 
-- **Dependency errors:** Parsl has several dependencies, such as `pyzmq`, `dill`, and `globus-sdk`. If you encounter errors related to these dependencies, try installing them manually using pip. For example:
+- **Dependency errors:** Parsl has several dependencies, such as ``pyzmq``, ``dill``, and ``globus-sdk``. If you encounter errors related to these dependencies, try installing them manually using pip. For example:
 
   .. code-block:: bash