Bump r-lib/actions from 1 to 2

Bumps [r-lib/actions](https://github.com/r-lib/actions) from 1 to 2.
- [Release notes](https://github.com/r-lib/actions/releases)
- [Commits](r-lib/actions@v1...v2)

---
updated-dependencies:
- dependency-name: r-lib/actions
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/python.yml

@@ -45,7 +45,7 @@ jobs:
           pip install tox tox-gh-actions
 
       - name: Set up Pandoc
-        uses: r-lib/actions/setup-pandoc@v1
+        uses: r-lib/actions/setup-pandoc@v2
 
       - name: Set up IPFS
         if: startsWith(runner.os, 'Linux') && (matrix.py == '3.9')