Update dependabot config to prevent redundant PR creation

[yunchu]

Summary

How to test

Checklist

• [ ] I have added unit tests to cover my changes.​
• [ ] I have added integration tests to cover my changes.​
• [ ] I have added the description of my changes into CHANGELOG.​
• [ ] I have updated the documentation accordingly

License

• [ ] I submit my code changes under the same MIT License that covers the project. Feel free to contact the maintainers if that's a concern.
• [ ] I have updated the license header for each file (see an example below).

# Copyright (C) 2024 Intel Corporation
#
# SPDX-License-Identifier: MIT

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 80.98%. Comparing base (44cc56a) to head (d456b4e). Report is 33 commits behind head on develop.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #1455 +/- ## =========================================== + Coverage 80.85% 80.98% +0.12% =========================================== Files 271 272 +1 Lines 30689 31144 +455 Branches 6197 6276 +79 =========================================== + Hits 24815 25223 +408 - Misses 4489 4505 +16 - Partials 1385 1416 +31 ``` | [Flag](https://app.codecov.io/gh/openvinotoolkit/datumaro/pull/1455/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=openvinotoolkit) | Coverage Δ | | |---|---|---| | [ubuntu-20.04_Python-3.10](https://app.codecov.io/gh/openvinotoolkit/datumaro/pull/1455/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=openvinotoolkit) | `80.96% <ø> (+0.12%)` | :arrow_up: | | [windows-2022_Python-3.10](https://app.codecov.io/gh/openvinotoolkit/datumaro/pull/1455/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=openvinotoolkit) | `80.96% <ø> (+0.12%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=openvinotoolkit#carryforward-flags-in-the-pull-request-comment) to find out more.

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.