Bump mamba-org/setup-micromamba from 2.0.2 to 2.0.3 in the actions group

Bumps the actions group with 1 update: [mamba-org/setup-micromamba](https://github.com/mamba-org/setup-micromamba).


Updates `mamba-org/setup-micromamba` from 2.0.2 to 2.0.3
- [Release notes](https://github.com/mamba-org/setup-micromamba/releases)
- [Commits](mamba-org/setup-micromamba@06375d8...068f1ab)

---
updated-dependencies:
- dependency-name: mamba-org/setup-micromamba
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: actions
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/main.yml

@@ -376,7 +376,7 @@ jobs:
         with:
           persist-credentials: false
       - name: Setup Conda (Micromamba) with Python${{ matrix.python-version }}
-        uses: mamba-org/setup-micromamba@06375d89d211a1232ef63355742e9e2e564bc7f7 # v2.0.2
+        uses: mamba-org/setup-micromamba@068f1ab4b37ed9b3d9f73da7db90a0cda0a48d29 # v2.0.3
         with:
           cache-downloads: true
           cache-environment: true

.github/workflows/upstream.yml

@@ -71,7 +71,7 @@ jobs:
           fetch-depth: 0 # Fetch all history for all branches and tags.
           persist-credentials: false
       - name: Setup Conda (Micromamba) with Python${{ matrix.python-version }}
-        uses: mamba-org/setup-micromamba@06375d89d211a1232ef63355742e9e2e564bc7f7 # v2.0.2
+        uses: mamba-org/setup-micromamba@068f1ab4b37ed9b3d9f73da7db90a0cda0a48d29 # v2.0.3
         with:
           cache-downloads: true
           cache-environment: true