update README.md (tox 4.23.2)

README.md

@@ -20,7 +20,7 @@ In your GitHub Actions workflow, use this action like so:
 
 ```yaml
       - name: Install tox from PyPI
-        uses: install-pinned/tox@a2d03a8a8f205452b06c1d554d281b509ba041f0  # 4.23.2
+        uses: install-pinned/tox@df7de761a0afdb799e3c4af5fe319aee20d3e8e8  # 4.23.2
 ```
 
 You can [set up Dependabot](https://docs.github.com/en/code-security/dependabot/working-with-dependabot/keeping-your-actions-up-to-date-with-dependabot#example-dependabotyml-file-for-github-actions)