Bump codecov/codecov-action from 3 to 4

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 3 to 4.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](codecov/codecov-action@v3...v4)

---
updated-dependencies:
- dependency-name: codecov/codecov-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/upload_cov.yaml

@@ -26,7 +26,7 @@ jobs:
         env:
           SKIP_EXT_BACKENDS: "true"
         run: cargo llvm-cov nextest --features=filesystem,localhost-testing,multi-threaded -p citadel_sdk -p citadel_user -p citadel_crypt -p citadel_pqcrypto -p citadel_wire -p netbeam -p async_ip --lcov --output-path ${GITHUB_WORKSPACE}/lcov.info --ignore-filename-regex="firebase-rtdb/src/lib.rs|netbeam/src/sync/operations/net_join.rs|netbeam/src/sync/operations/net_select.rs|citadel_sdk/src/test_common.rs|citadel_wire/src/upnp_handler.rs"
-      - uses: codecov/codecov-action@v3
+      - uses: codecov/codecov-action@v4
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           files: ${{ env.GITHUB_WORKSPACE }}/lcov.info

.github/workflows/validate.yml

@@ -179,7 +179,7 @@ jobs:
         env:
           SKIP_EXT_BACKENDS: "true"
         run: cargo llvm-cov nextest --features=filesystem,localhost-testing,multi-threaded -p citadel_sdk -p citadel_user -p citadel_crypt -p citadel_pqcrypto -p citadel_wire -p netbeam -p async_ip --lcov --output-path ${GITHUB_WORKSPACE}/lcov.info --ignore-filename-regex="firebase-rtdb/src/lib.rs|netbeam/src/sync/operations/net_join.rs|netbeam/src/sync/operations/net_select.rs|citadel_sdk/src/test_common.rs|citadel_wire/src/upnp_handler.rs"
-      - uses: codecov/codecov-action@v3
+      - uses: codecov/codecov-action@v4
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           files: ${{ env.GITHUB_WORKSPACE }}/lcov.info