Bump pygments from 2.19.2 to 2.20.0 in /python/example_code/bedrock-runtime (#7804)

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