Sanitize pattern names

Author: adamtheturtle

.github/workflows/test.yml

@@ -166,11 +166,16 @@ jobs:
         env:
           UV_PYTHON: ${{ matrix.python-version }}
 
+      - name: Sanitize pattern for artifact name
+        id: sanitize
+        run: |
+          SANITIZED_PATTERN=$(echo "${{ matrix.ci_pattern }}" | sed 's/::/-/g' | sed 's/:/-/g' | sed 's|/|-|g')
+          echo "name=coverage-data-ci-${{ matrix.python-version }}-${SANITIZED_PATTERN}" >> "$GITHUB_OUTPUT"
+
       - name: Upload coverage data
         uses: actions/upload-artifact@v4
         with:
-          name: |
-            coverage-data-ci-${{ matrix.python-version }}-${{ matrix.ci_pattern}}
+          name: ${{ steps.sanitize.outputs.name }}
           path: .coverage.*
           include-hidden-files: true
           if-no-files-found: error