chore(deps): update actions/upload-artifact action to v6 (#770)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
|
[actions/upload-artifact](https://redirect.github.com/actions/upload-artifact)
| action | major | `v5.0.0` -> `v6.0.0` |

---

### Release Notes

<details>
<summary>actions/upload-artifact (actions/upload-artifact)</summary>

###
[`v6.0.0`](https://redirect.github.com/actions/upload-artifact/compare/v5.0.0...v6.0.0)

[Compare
Source](https://redirect.github.com/actions/upload-artifact/compare/v5.0.0...v6.0.0)

</details>

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.github/workflows/generate-code.yml

@@ -74,7 +74,7 @@ jobs:
 
       - name: Upload diff artifact
         if: env.DIFF_IS_EMPTY != 'true'
-        uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4 # v5.0.0
+        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6.0.0
         with:
           name: codegen-diff
           path: diff.patch