Bump mamba-org/setup-micromamba from 1 to 2 (#213)

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.yml

@@ -29,7 +29,7 @@ jobs:
 
       - name: Set up Python (micromamba) [>3.6]
         if: matrix.python-version != '3.6'
-        uses: mamba-org/setup-micromamba@v1
+        uses: mamba-org/setup-micromamba@v2
         with:
           environment-file: environment-dev.yml
           cache-environment: true
@@ -38,7 +38,7 @@ jobs:
 
       - name: Set up Python (micromamba) [3.6]
         if: matrix.python-version == '3.6'
-        uses: mamba-org/setup-micromamba@v1
+        uses: mamba-org/setup-micromamba@v2
         with:
           environment-file: environment-dev.yml
           cache-environment: true
@@ -67,7 +67,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Set up Python (micromamba)
-        uses: mamba-org/setup-micromamba@v1
+        uses: mamba-org/setup-micromamba@v2
         with:
           environment-file: docs/environment-docs.yml
           cache-environment: true