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] <support@github.com>

.github/workflows/conda.yml

@@ -41,7 +41,7 @@ jobs:
  - name: Checkout
  uses: actions/checkout@v4
 
- - uses: mamba-org/setup-micromamba@v1
+ - uses: mamba-org/setup-micromamba@v2
  with:
  micromamba-version: '1.5.7-0'
  environment-file: conda/dev-environment-unix.yml
@@ -51,7 +51,7 @@ jobs:
  post-cleanup: 'all'
  if: ${{ runner.os != 'Windows' }}
 
- - uses: mamba-org/setup-micromamba@v1
+ - uses: mamba-org/setup-micromamba@v2
  with:
  micromamba-version: '1.5.7-0'
  environment-file: conda/dev-environment-win.yml