Update the version of PostHog used in the cli package.

[samwho]

Description

This needs to always line up with what backend-core uses because cli depends on backend-core. If you don't do this, you end up getting errors like this:

➜  ~ budi hosting --init
/Users/jvcalderon/.nvm/versions/node/v20.10.0/lib/node_modules/@budibase/cli/dist/index.js:892534
    this.posthog = new import_posthog_node3.PostHog(token);
                   ^

TypeError: import_posthog_node3.PostHog is not a constructor

[jvcalderon]

LGTM