Update checkout and miniconda runners

.github/workflows/build_manual.yml

@@ -28,24 +28,19 @@ jobs:
             condarc: .conda_mac/condarc.yaml
     steps:
       # Setup
-      - uses: actions/checkout@v2
-      - name: Cache conda
-        uses: actions/cache@v1
-        env:
-          # Increase this value to reset cache if environment_build.yml has not changed
-          CACHE_NUMBER: 0
-        with:
-          path: ~/conda_pkgs_dir
-          key: ${{ runner.os }}-conda-${{ env.CACHE_NUMBER }}-${{ hashFiles('environment_build.yml', 'requirements.txt') }}
+      - name: Checkout
+        uses: actions/checkout@v4
+
       - name: Setup Miniconda
-        # https://github.com/conda-incubator/setup-miniconda
-        uses: conda-incubator/setup-miniconda@v2.0.1
+        uses: conda-incubator/setup-miniconda@v3.0.3
         with:
+          miniforge-version: latest
+          condarc-file: ${{ matrix.condarc }}
           python-version: 3.7
-          use-only-tar-bz2: true # IMPORTANT: This needs to be set for caching to work properly!
           environment-file: environment_build.yml
-          condarc-file: ${{ matrix.condarc }}
           activate-environment: sleap_ci
+          conda-solver: "libmamba"
+
       - name: Print environment info
         shell: bash -l {0}
         run: |