Update siliconcompiler requirement in the python-packages group (#259)

Updates the requirements on [siliconcompiler](https://github.com/siliconcompiler/siliconcompiler) to permit the latest version.

Updates `siliconcompiler` to 0.28.1
- [Release notes](https://github.com/siliconcompiler/siliconcompiler/releases)
- [Changelog](https://github.com/siliconcompiler/siliconcompiler/blob/main/Changes)
- [Commits](siliconcompiler/siliconcompiler@v0.27.0...v0.28.1)

---
updated-dependencies:
- dependency-name: siliconcompiler
  dependency-type: direct:production
  dependency-group: python-packages
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements.txt

@@ -10,7 +10,7 @@
 
 numpy
 tqdm
-siliconcompiler >= 0.27.0, < 0.28.0
+siliconcompiler >= 0.27.0, < 0.29.0
 
 # Testing dependencies
 #:test