update sentry_devenv==1.20.0

Author: sentry-release-bot[bot]

packages.ini

@@ -1836,6 +1836,7 @@ python_versions = <3.13
 [sentry-devenv==1.17.0]
 [sentry-devenv==1.18.0]
 [sentry-devenv==1.19.0]
+[sentry-devenv==1.20.0]
 
 [sentry-forked-django-stubs==4.2.6.post1]
 [sentry-forked-django-stubs==4.2.6.post2]