Update codecov/codecov-action action to v7

Signed-off-by: red-hat-konflux <126015336+red-hat-konflux[bot]@users.noreply.github.com>

Author: red-hat-konflux[bot]

.github/workflows/gating.yaml

@@ -38,7 +38,7 @@ jobs:
         run: tox -e docs
       - name: tests
         run: tox -e py3
-      - uses: codecov/codecov-action@v6
+      - uses: codecov/codecov-action@v7
         with:
           use_oidc: true
           flags: unit-tests