update README.md (uv 0.2.9)

README.md

@@ -20,7 +20,7 @@ In your GitHub Actions workflow, use this action like so:
 
 ```yaml
       - name: Install uv from PyPI
-        uses: install-pinned/uv@c5c76cff32f124acafbe14ec00c860709dd69f35  # 0.2.8
+        uses: install-pinned/uv@62e7c3115d1ccbefe949112769abb40a5e670bf1  # 0.2.9
 ```
 
 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)