Merge pull request #406 from jdebacker/readme

Add py 313 badge

Author: jdebacker

README.md

@@ -3,7 +3,7 @@
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 | Org | [![PSL cataloged](https://img.shields.io/badge/PSL-cataloged-a0a0a0.svg)](https://www.PSLmodels.org) [![OS License: CCO-1.0](https://img.shields.io/badge/OS%20License-CCO%201.0-yellow)](https://github.com/PSLmodels/Cost-of-Capital-Calculator/blob/master/LICENSE) [![Jupyter Book Badge](https://jupyterbook.org/badge.svg)](https://ccc.pslmodels.org) |
-| Package | [![Python 3.10](https://img.shields.io/badge/python-3.10-blue.svg)](https://www.python.org/downloads/release/python-3108/) [![Python 3.11](https://img.shields.io/badge/python-3.11-blue.svg)](https://www.python.org/downloads/release/python-3118/) [![Python 3.12](https://img.shields.io/badge/python-3.12-blue.svg)](https://www.python.org/downloads/release/python-3128/) [![PyPI Latest Release](https://img.shields.io/pypi/v/cost-of-capital-calculator.svg)](https://pypi.org/project/cost-of-capital-calculator/) [![PyPI Downloads](https://img.shields.io/pypi/dm/cost-of-capital-calculator.svg?label=PyPI%20downloads)](https://pypi.org/project/cost-of-capital-calculator/) [![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black) |
+| Package | [![Python 3.11](https://img.shields.io/badge/python-3.11-blue.svg)](https://www.python.org/downloads/release/python-3118/) [![Python 3.12](https://img.shields.io/badge/python-3.12-blue.svg)](https://www.python.org/downloads/release/python-3129/) [![Python 3.13](https://img.shields.io/badge/python-3.13-blue.svg)](https://www.python.org/downloads/release/python-3137/) [![PyPI Latest Release](https://img.shields.io/pypi/v/cost-of-capital-calculator.svg)](https://pypi.org/project/cost-of-capital-calculator/) [![PyPI Downloads](https://img.shields.io/pypi/dm/cost-of-capital-calculator.svg?label=PyPI%20downloads)](https://pypi.org/project/cost-of-capital-calculator/) [![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black) |
 | Testing | ![example event parameter](https://github.com/PSLmodels/Cost-of-Capital-Calculator/actions/workflows/build_and_test.yml/badge.svg?branch=master) ![example event parameter](https://github.com/PSLmodels/Cost-of-Capital-Calculator/actions/workflows/deploy_jupyterbook.yml/badge.svg?branch=master) ![example event parameter](https://github.com/PSLmodels/Cost-of-Capital-Calculator/actions/workflows/check_formatting.yml/badge.svg?branch=master) [![Codecov](https://codecov.io/gh/PSLmodels/Cost-of-Capital-Calculator/branch/master/graph/badge.svg)](https://codecov.io/gh/PSLmodels/Cost-of-Capital-Calculator) |
 
 # Cost-of-Capital-Calculator