Bump pygments in /python/example_code/bedrock-runtime

Bumps [pygments](https://github.com/pygments/pygments) from 2.19.2 to 2.20.0.
- [Release notes](https://github.com/pygments/pygments/releases)
- [Changelog](https://github.com/pygments/pygments/blob/master/CHANGES)
- [Commits](pygments/pygments@2.19.2...2.20.0)

---
updated-dependencies:
- dependency-name: pygments
  dependency-version: 2.20.0
  dependency-type: direct:production
...

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Author: dependabot[bot]

python/example_code/bedrock-runtime/requirements.txt

@@ -5,7 +5,7 @@ iniconfig==2.0.0
 jmespath==1.0.1
 packaging==24.2
 pluggy==1.5.0
-Pygments==2.19.2
+Pygments==2.20.0
 pytest==8.4.2
 python-dateutil==2.9.0.post0
 s3transfer==0.14.0