build(deps): Bump mamba-org/setup-micromamba

Bumps [mamba-org/setup-micromamba](https://github.com/mamba-org/setup-micromamba) from 23e257ce1bdee5c863c217655617477b5887b494 to 8767fb704bd78032e9392f0386bf46950bdd1194.
- [Release notes](https://github.com/mamba-org/setup-micromamba/releases)
- [Commits](mamba-org/setup-micromamba@23e257c...8767fb7)

---
updated-dependencies:
- dependency-name: mamba-org/setup-micromamba
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/ci.yml

@@ -23,7 +23,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: micromamba installation
-        uses: mamba-org/setup-micromamba@23e257ce1bdee5c863c217655617477b5887b494
+        uses: mamba-org/setup-micromamba@8767fb704bd78032e9392f0386bf46950bdd1194
       - name: add micromamba to GITHUB_PATH
         run: echo "${HOME}/micromamba-bin" >> "$GITHUB_PATH"
       - name: Install Python 3.11
@@ -43,7 +43,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: conda env setup
-        uses: mamba-org/setup-micromamba@23e257ce1bdee5c863c217655617477b5887b494
+        uses: mamba-org/setup-micromamba@8767fb704bd78032e9392f0386bf46950bdd1194
         with:
           environment-file: environment.yml
           cache-environment: true