Add webapp as owner for toxic-config component

Author: Andrew Farries

.github/CODEOWNERS

@@ -29,6 +29,7 @@
 /components/image-builder-mk3 @gitpod-io/engineering-workspace
 /components/installation-telemetry @gitpod-io/engineering-delivery-operations-experience
 /components/kots-config-check @gitpod-io/engineering-delivery-operations-experience
+/components/toxic-config @gitpod-io/engineering-webapp
 /install @gitpod-io/engineering-delivery-operations-experience
 /install/installer @gitpod-io/engineering-delivery-operations-experience
 # For testdata a single review from anyone who is allowed to review PRs is sufficent.