chore(helm): add trailing newline to README to exercise prerelease workflow

Author: nicktrn

hosting/k8s/helm/README.md

@@ -736,4 +736,4 @@ helm upgrade --install trigger . \
 
 - Documentation: https://trigger.dev/docs/self-hosting
 - GitHub Issues: https://github.com/triggerdotdev/trigger.dev/issues
-- Discord: https://discord.gg/untWVke9aH
+- Discord: https://discord.gg/untWVke9aH