Update CONTRIBUTING.md (#1943)

## Description

Update contributing.md 

## Type of change

Please check the options that are relevant:

- [x] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [ ] Model update (Addition or modification of models)
- [ ] Other (please describe):

---

## Checklist

- [ ] Adherence to standards: Code complies with Agno’s style guidelines
and best practices.
- [ ] Formatting and validation: You have run `./scripts/format.sh` and
`./scripts/validate.sh` to ensure code is formatted and linted.
- [ ] Self-review completed: A thorough review has been performed by the
contributor(s).
- [ ] Documentation: Docstrings and comments have been added or updated
for any complex logic.
- [ ] Examples and guides: Relevant cookbook examples have been included
or updated (if applicable).
- [ ] Tested in a clean environment: Changes have been tested in a clean
environment to confirm expected behavior.
- [ ] Tests (optional): Tests have been added or updated to cover any
new or changed functionality.

---

## Additional Notes

Include any deployment notes, performance implications, security
considerations, or other relevant information (e.g., screenshots or logs
if applicable).

---------

Co-authored-by: Manthan Gupta <[email protected]>

Author: anuragts

CONTRIBUTING.md

@@ -50,8 +50,8 @@ These scripts will perform code formatting with `ruff` and static type checks wi
    - The `VectorDb` interface is defined in `libs/agno/agno/vectordb/base
    - Import your `VectorDb` Class in `libs/agno/agno/vectordb/<your_db>/__init__.py`.
    - Checkout the [`libs/agno/agno/vectordb/pgvector/pgvector`](https://github.com/agno-agi/agno/blob/main/libs/agno/agno/vectordb/pgvector/pgvector.py) file for an example.
-4. Add a recipe for using your `VectorDb` under `cookbook/vectordb/<your_db>`.
-   - Checkout [`agno/cookbook/vectordb/pgvector`](https://github.com/agno-agi/agno/tree/main/cookbook/vectordb/pgvector) for an example.
+4. Add a recipe for using your `VectorDb` under `cookbook/agent_concepts/knowledge/vector_dbs//<your_db>`.
+   - Checkout [`cookbook/agent_concepts/knowledge/vector_dbs/pg_vector`](https://github.com/agno-agi/agno/blob/main/cookbook/agent_concepts/knowledge/vector_dbs/pg_vector.py) for an example.
 5. Important: Format and validate your code by running `./scripts/format.sh` and `./scripts/validate.sh`.
 6. Submit a pull request.