Update README.md about Releasing instructions (#155)

Releasing instructions is moved to https://github.com/PostHog/posthog-js-lite/blob/main/RELEASING.md md.

README.md

@@ -62,10 +62,3 @@ cd examples/example-node
 yarn && yarn start
 # example-expo has some buttons that will talk to this server
 ```
-
-## Publishing a new version
-
-1. Go to the appropriate `package.json` file. For example, for `posthog-node`, this is `posthog-node/package.json`.
-2. Bump the version number in the file.
-3. Add to `CHANGELOG.md` the relevant changes.
-4. On merge, a new version is published automatically thanks to the CI pipeline.