Bump codecov/codecov-action from 4 to 5 (#1562)

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -55,7 +55,7 @@ jobs:
 
       - run: coverage-prepare lcov python/pydantic_core/*.so
 
-      - uses: codecov/codecov-action@v4
+      - uses: codecov/codecov-action@v5
 
   # See https://github.com/PyO3/pyo3/discussions/2781
   # tests intermittently segfault with pypy and cpython 3.7 when using `coverage run ...`, hence separate job