Bump mamba-org/setup-micromamba from 1 to 2 (#393)

Bumps [mamba-org/setup-micromamba](https://github.com/mamba-org/setup-micromamba) from 1 to 2.
- [Release notes](https://github.com/mamba-org/setup-micromamba/releases)
- [Commits](mamba-org/setup-micromamba@v1...v2)

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

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

.github/workflows/ci.yaml

@@ -40,7 +40,7 @@ jobs:
       - name: Checkout source
         uses: actions/checkout@v4
       - name: Create conda environment
-        uses: mamba-org/setup-micromamba@v1
+        uses: mamba-org/setup-micromamba@v2
         with:
           cache-downloads: true
           micromamba-version: "latest"
@@ -82,7 +82,7 @@ jobs:
           access_token: ${{ github.token }}
       - uses: actions/checkout@v4
       - name: Create conda environment
-        uses: mamba-org/setup-micromamba@v1
+        uses: mamba-org/setup-micromamba@v2
         with:
           cache-downloads: true
           micromamba-version: "latest"