Update actions/upload-artifact action to v7

Author: renovate[bot]

.github/workflows/testing.yml

@@ -77,7 +77,7 @@ jobs:
           make test-cover
 
       - name: Upload coverage
-        uses: actions/upload-artifact@50769540e7f4bd5e21e526ee35c689e35e0d6874 # v4.4.0
+        uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7.0.0
         with:
           name: coverage-${{ matrix.os }}-${{ matrix.go }}
           path: coverage.*