Bump mamba-org/setup-micromamba from 2.0.5 to 2.0.6 (#411)

Bumps [mamba-org/setup-micromamba](https://github.com/mamba-org/setup-micromamba) from 2.0.5 to 2.0.6.
- [Release notes](https://github.com/mamba-org/setup-micromamba/releases)
- [Commits](mamba-org/setup-micromamba@v2.0.5...v2.0.6)

---
updated-dependencies:
- dependency-name: mamba-org/setup-micromamba
  dependency-version: 2.0.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/docs.yml

@@ -57,7 +57,7 @@ jobs:
           tlmgr list --only-installed
 
       - name: 🐍 Install Conda environment
-        uses: mamba-org/setup-micromamba@v2.0.5
+        uses: mamba-org/setup-micromamba@v2.0.6
         with:
           environment-file: .github/workflows/micromamba/docs.yml
           environment-name: docs