update sentry_arroyo==2.20.8

Author: sentry-release-bot[bot]

packages.ini

@@ -1693,6 +1693,7 @@ python_versions = <3.13
 [sentry-arroyo==2.20.5]
 [sentry-arroyo==2.20.6]
 [sentry-arroyo==2.20.7]
+[sentry-arroyo==2.20.8]
 
 [sentry-cli==2.14.3]
 [sentry-cli==2.14.4]