Add selector to coverage name.

Author: ioquatix

.github/workflows/coverage.yaml

@@ -51,7 +51,7 @@ jobs:
 
     - uses: actions/upload-artifact@v3
       with:
-        name: coverage-${{matrix.os}}-${{matrix.ruby}}
+        name: coverage-${{matrix.os}}-${{matrix.ruby}}-${{matrix.selector}}
         path: .covered.db
 
   validate: