CI: Fix typo

Author: HaoZeke

.github/workflows/build.yml

@@ -36,7 +36,7 @@ jobs:
           channels: conda-forge,anaconda
       - name: Install dependencies
         run: |
-          conda install scipy numpy pytest
+          conda install scipy numpy pytest meson meson-python
       - name: Test
         run: |
           python -m pip install -v . --no-build-isolation -Csetup-args=-Duse_openmp=true