Bump mamba-org/setup-micromamba from 2.0.2 to 2.0.3 in the actions group (#2024)

Author: dependabot[bot]

.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