fix broken link to supported formats (openvinotoolkit#1221)

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### Summary
fix broken link to supported formats
<!--
Resolves openvinotoolkit#111 and openvinotoolkit#222.
Depends on openvinotoolkit#1000 (for series of dependent commits).

This PR introduces this capability to make the project better in this
and that.

- Added this feature
- Removed that feature
- Fixed the problem openvinotoolkit#1234
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### How to test
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### Checklist
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- [ ] I have added unit tests to cover my changes.​
- [ ] I have added integration tests to cover my changes.​
- [x] I have added the description of my changes into
[CHANGELOG](https://github.com/openvinotoolkit/datumaro/blob/develop/CHANGELOG.md).​
- [ ] I have updated the
[documentation](https://github.com/openvinotoolkit/datumaro/tree/develop/docs)
accordingly

### License

- [ ] I submit _my code changes_ under the same [MIT
License](https://github.com/openvinotoolkit/datumaro/blob/develop/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).

```python
# Copyright (C) 2023 Intel Corporation
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# SPDX-License-Identifier: MIT
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CHANGELOG.md

@@ -25,6 +25,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   (<https://github.com/openvinotoolkit/datumaro/pull/1210>)
 - Fix label compare of distance method
   (<https://github.com/openvinotoolkit/datumaro/pull/1205>)
+- Fix broken link to supported formats in readme
+  (<https://github.com/openvinotoolkit/datumaro/pull/1221>)
 
 ## 16/11/2023 - Release 1.5.1
 ### Enhancements

README.md

@@ -46,7 +46,7 @@ CVAT annotations                             ---> Publication, statistics etc.
     (`bboxes`, `masks`)
   - [YOLO](https://github.com/AlexeyAB/darknet#how-to-train-pascal-voc-data) (`bboxes`)
 
-  Other formats and documentation for them can be found [here](https://openvinotoolkit.github.io/datumaro/latest/docs/data-formats/supported_formats).
+  Other formats and documentation for them can be found [here](https://openvinotoolkit.github.io/datumaro/latest/docs/data-formats/formats).
 - Dataset building
   - Merging multiple datasets into one
   - Dataset filtering by a custom criteria: