test.yml: Give each coverage artifact a unique name (#86)

test.yml: Give each coverage file unique names

.github/workflows/test.yml

@@ -36,11 +36,11 @@ jobs:
         pytest
         python -m pip install -e .
         coverage run -m pytest .
-        coverage json  --include "src/*"
+        coverage json  --include "src/*" -o ${{ matrix.python-version }}_coverage.json
     - name: "Upload coverage data"
       uses: actions/upload-artifact@v4
       with:
-        name: covdata
+        name: ${{ matrix.python-version }}_covdata
         path: coverage.json
 
   coverage:
@@ -58,7 +58,7 @@ jobs:
       - name: "Download coverage data"
         uses: actions/download-artifact@v4
         with:
-          name: covdata
+          name: 3.11_covdata
       - name: Extract coverage stats
         run: |
           export TOTAL=$(python -c "import json;print(json.load(open('coverage.json'))['totals']['percent_covered_display'])")