Bump mamba-org/setup-micromamba from 1 to 2 (#4)

* Bump mamba-org/setup-micromamba from 1 to 2

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]>

* Update unittest.yml

* Update unittest.yml

---------

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

.github/workflows/unittest.yml

@@ -15,7 +15,7 @@ jobs:
         shell: bash -l {0}
     steps:
       - uses: actions/checkout@v4
-      - uses: mamba-org/setup-micromamba@v1
+      - uses: mamba-org/setup-micromamba@v2
         with:
           environment-file: environment.yml
           cache-environment-key: ${{ runner.os }}-env-${{ hashFiles('**/environment.yml') }}