Bump miniconda GitHub actions version to 3

Author: elevans

.github/workflows/build.yml

@@ -79,7 +79,7 @@ jobs:
           path: ~/conda_pkgs_dir
           key:
             ${{ runner.os }}-conda-${{ env.CACHE_NUMBER }}-${{ hashFiles('dev-environment.yml') }}
-      - uses: conda-incubator/setup-miniconda@v2
+      - uses: conda-incubator/setup-miniconda@v3
         with:
           # Create env with dev packages
           auto-update-conda: true