dep: unpin setuptools

**Describe the bug**

[Unpin](https://github.com/amazon-braket/amazon-braket-algorithm-library/blob/main/doc/requirements.txt) setuptools depending on sphinx's fix for pkg_resources

See: https://github.com/pypa/setuptools/issues/5174

**To reproduce**
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**Expected behavior**
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**Screenshots or logs**
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**System information**
A description of your system. Please provide:
- **Amazon Braket Python Algorithm Library version**:
- **Amazon Braket Python SDK version**:
- **Amazon Braket Python Schemas version**:
- **Amazon Braket Python Default Simulator version**:
- **Python version**:

**Additional context**
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