Bump mamba-org/setup-micromamba from 2.0.3 to 2.0.4 (#449)

Author: dependabot[bot]

.github/workflows/main.yml

@@ -61,7 +61,7 @@ jobs:
         with:
           persist-credentials: false
       - name: Setup Conda (Micromamba) with Python${{ matrix.python-version }}
-        uses: mamba-org/setup-micromamba@068f1ab4b37ed9b3d9f73da7db90a0cda0a48d29 # v2.0.3
+        uses: mamba-org/setup-micromamba@0dea6379afdaffa5d528b3d1dabc45da37f443fc # v2.0.4
         with:
           cache-downloads: true
           cache-environment: true