Add "last commit" badge

Author: dannyadair

README.md

@@ -1,8 +1,9 @@
 # pdfbaker
 
 [![PyPI version](https://img.shields.io/pypi/v/pdfbaker)](https://pypi.org/project/pdfbaker/)
+
 [![tests](https://github.com/pythonnz/pdfbaker/actions/workflows/tests.yaml/badge.svg)](https://github.com/pythonnz/pdfbaker/actions/workflows/tests.yaml)
-[![Python](https://img.shields.io/pypi/pyversions/pdfbaker)](https://pypi.org/project/pdfbaker/)
+[![Last commit](https://img.shields.io/github/last-commit/pythonnz/pdfbaker)](https://github.com/pythonnz/pdfbaker)[![Python](https://img.shields.io/pypi/pyversions/pdfbaker)](https://github.com/pythonnz/pdfbaker/)
 [![codecov](https://codecov.io/gh/pythonnz/pdfbaker/branch/main/graph/badge.svg)](https://codecov.io/gh/pythonnz/pdfbaker)
 [![Downloads](https://img.shields.io/pypi/dw/pdfbaker)](https://pypistats.org/packages/pdfbaker)
 [![License](https://img.shields.io/github/license/pythonnz/pdfbaker)](https://github.com/pythonnz/pdfbaker/blob/main/LICENSE)