Update actions/setup-python action to v4.8.0 (#284)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [actions/setup-python](https://togithub.com/actions/setup-python) |
action | minor | `v4.7.1` -> `v4.8.0` |

---

### Release Notes

<details>
<summary>actions/setup-python (actions/setup-python)</summary>

###
[`v4.8.0`](https://togithub.com/actions/setup-python/releases/tag/v4.8.0)

[Compare
Source](https://togithub.com/actions/setup-python/compare/v4.7.1...v4.8.0)

#### What's Changed

In scope of this release we added support for GraalPy
([actions/setup-python#694).
You can use this snippet to set up GraalPy:

```yaml
steps:
- uses: actions/checkout@v4
- uses: actions/setup-python@v4 
  with:
    python-version: 'graalpy-22.3' 
- run: python my_script.py
```

Besides, the release contains such changes as:

- Trim python version when reading from file by
[@&#8203;FerranPares](https://togithub.com/FerranPares) in
[actions/setup-python#628
- Use non-deprecated versions in examples by
[@&#8203;jeffwidman](https://togithub.com/jeffwidman) in
[actions/setup-python#724
- Change deprecation comment to past tense by
[@&#8203;jeffwidman](https://togithub.com/jeffwidman) in
[actions/setup-python#723
- Bump [@&#8203;babel/traverse](https://togithub.com/babel/traverse)
from 7.9.0 to 7.23.2 by
[@&#8203;dependabot](https://togithub.com/dependabot) in
[actions/setup-python#743
- advanced-usage.md: Encourage the use actions/checkout@v4 by
[@&#8203;cclauss](https://togithub.com/cclauss) in
[actions/setup-python#729
- Examples now use checkout@v4 by
[@&#8203;simonw](https://togithub.com/simonw) in
[actions/setup-python#738
- Update actions/checkout to v4 by
[@&#8203;dmitry-shibanov](https://togithub.com/dmitry-shibanov) in
[actions/setup-python#761

#### New Contributors

- [@&#8203;FerranPares](https://togithub.com/FerranPares) made their
first contribution in
[actions/setup-python#628
- [@&#8203;timfel](https://togithub.com/timfel) made their first
contribution in
[actions/setup-python#694
- [@&#8203;jeffwidman](https://togithub.com/jeffwidman) made their first
contribution in
[actions/setup-python#724

**Full Changelog**:
actions/setup-python@v4...v4.8.0

</details>

---

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rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update
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---

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---

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.github/workflows/main.yml

@@ -20,7 +20,7 @@ jobs:
         uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
 
       - name: Set up Python
-        uses: actions/setup-python@65d7f2d534ac1bc67fcd62888c5f4f3d2cb2b236 # v4.7.1
+        uses: actions/setup-python@b64ffcaf5b410884ad320a9cfac8866006a109aa # v4.8.0
         with:
           python-version: 3.11.4
 
@@ -38,7 +38,7 @@ jobs:
         uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
 
       - name: Set up Python
-        uses: actions/setup-python@65d7f2d534ac1bc67fcd62888c5f4f3d2cb2b236 # v4.7.1
+        uses: actions/setup-python@b64ffcaf5b410884ad320a9cfac8866006a109aa # v4.8.0
         with:
           python-version: 3.11.4