Update VERSION - release branch v2.0 (#354)

(**NOTE:** _**delete** these instructional lines as you fill-out this PR
template_)

(**NOTE:** _template is designed to be filled-in and used as the
**squashed commit message for the entire PR**. _Italicized text_ is
intended to be deleted as you fill in this template. Use the text
between the `---`)

---

_High level summary of changes. Try to keep this as short and
informative as possible: less is more._

_Describe your changes. You can be more detailed and descriptive here.
If it is a code change, Be sure to answer:_
  - _What is changing?_
  - _What is the new or fixed functionality?_
  - _Why or when would someone want to use these changes?_
  - _How can someone use these changes?_
---

## Summary
_High level summary of changes. Try to keep this as short and
informative as possible: less is more._

## Details
_Describe your changes. You can be more detailed and descriptive here._

## Usage
_How does a user interact with the changed code?_
```python
python -m your.new.module -and -all -options
```

## Testing
_How do you prove that your code behaves the way you claim?_

Tests for these changes can be run via:
```shell
pytest -v tests/your/new/or/existing/test_functions.py::test_function
```


(**NOTE:** _also **delete** this checklist as you fill-out this PR
template_)

**Most of the changes** to files with extensions `*.py`, `*.yaml`,
`*.yml`, `Dockerfile*` or `requirements.txt` **DO REQUIRE both `pytest-`
and `jet-` CI stages**.

- [ ] Did you review the [Before your PR is "Ready for review"
section](https://github.com/NVIDIA/bionemo-framework/-/blob/dev/CONTRIBUTING.md?ref_type=heads#before-pr-ready)
before asking for review?
- [ ] Did you make sure your changes have tests? Did you test your
changes locally?
- [ ] Can you add [the `SKIP_CI`
label](https://github.com/NVIDIA/bionemo-framework/-/blob/dev/CONTRIBUTING.md?ref_type=heads#skip-ci)
to your PR?
- [ ] Can you add [the `PYTEST_NOT_REQUIRED`
label](https://github.com/NVIDIA/bionemo-framework/-/blob/dev/CONTRIBUTING.md?ref_type=heads#skip-pytest)
to your PR?
- [ ] Can you add [the `JET_NOT_REQUIRED`
label](https://github.com/NVIDIA/bionemo-framework/-/blob/dev/CONTRIBUTING.md?ref_type=heads#skip-jet)
to your PR?

Signed-off-by: Dorota Toczydlowska <115542912+dorotat-nv@users.noreply.github.com>

Author: dorotat-nv

VERSION

@@ -1 +1 @@
-2.0.0
+2.0