Update miniconda setup in build action

.github/workflows/build.yaml

@@ -19,19 +19,17 @@ jobs:
           # Need to clone everything for the git tags.
           fetch-depth: 0
 
-      - uses: conda-incubator/setup-miniconda@v2
+      - uses: conda-incubator/setup-miniconda@v3
         with:
           python-version: ${{ matrix.python-version }}
           channels: conda-forge,defaults
           channel-priority: strict
           show-channel-urls: true
-          miniforge-variant: Mambaforge
-          use-mamba: true
 
       - name: Update pip/wheel infrastructure
         shell: bash -l {0}
         run: |
-          mamba install -y -q pip wheel
+          conda install -y -q pip wheel
           pip install uv
 
       - name: Install dependencies