.github/workflows/ci-conda.yml: Update for versioned environment*.yml

Author: Matthias Koeppe

.github/workflows/ci-conda.yml

@@ -59,7 +59,7 @@ jobs:
         with:
           path: ~/conda_pkgs_dir
           key:
-            ${{ runner.os }}-conda-${{ hashFiles('src/environment.yml') }}
+            ${{ runner.os }}-conda-${{ hashFiles('src/environment-3.11.yml') }}
 
       - name: Setup Conda
         uses: conda-incubator/setup-miniconda@v2
@@ -69,7 +69,7 @@ jobs:
           channels: conda-forge,defaults
           channel-priority: true
           activate-environment: sage-build
-          environment-file: src/${{ matrix.conda-env }}.yml
+          environment-file: src/${{ matrix.conda-env }}-${{ matrix.python }}.yml
 
       - name: Print Conda environment
         shell: bash -l {0}