update help command snapshot

Author: Caleb Barnes

tests/integration/commands/help/__snapshots__/help.test.ts.snap

@@ -16,6 +16,8 @@ COMMANDS
   $ clone        Clone a remote repository and link it to an existing site on
                  Netlify
   $ completion   Generate shell completion script
+  $ db           Provision a production ready Postgres database with a single
+                 command
   $ deploy       Create a new deploy from the contents of a folder
   $ dev          Local dev server
   $ env          Control environment variables for the current site