docs: fix link

Author: podhmo

README.rst

@@ -4,7 +4,7 @@ node-semver
 .. image:: https://github.com/podhmo/python-node-semver/actions/workflows/python-package.yml/badge.svg
     :target: https://github.com/podhmo/python-node-semver/actions/workflows/python-package.yml
 
-python version of [node-semver](https://github.com/isaacs/node-semver)
+python version of `node-semver<https://github.com/isaacs/node-semver>`
 
 install
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