Bump mamba-org/setup-micromamba from 2 to 3 (#130)

Bumps [mamba-org/setup-micromamba](https://github.com/mamba-org/setup-micromamba) from 2 to 3.
- [Release notes](https://github.com/mamba-org/setup-micromamba/releases)
- [Commits](mamba-org/setup-micromamba@v2...v3)

---
updated-dependencies:
- dependency-name: mamba-org/setup-micromamba
  dependency-version: '3'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/full-stack.yaml

@@ -69,7 +69,7 @@ jobs:
         fetch-depth: 0
 
     - name: Set up conda environment
-      uses: mamba-org/setup-micromamba@v2
+      uses: mamba-org/setup-micromamba@v3
       with:
         environment-file: devtools/conda-envs/full-stack.yaml
         create-args: python=${{ matrix.python-version }}

.github/workflows/oe_license.yml

@@ -21,7 +21,7 @@ jobs:
       - uses: actions/checkout@v6
 
       - name: Set up conda environment
-        uses: mamba-org/setup-micromamba@v2
+        uses: mamba-org/setup-micromamba@v3
         with:
           micromamba-version: '1.5.6-0'
           environment-file: devtools/conda-envs/oe_license_check.yaml