New icons cannot be imported properly

[kurtdoherty]

Describe the bug
When a consumer tries to import a new icon from v5.0.0-beta.31, there are no types available. Looking at the installed package in the consumer's node_modules, there's no dist/types folder as we would expect.

Looking at the release-prod and release-prerelease CI pipelines, they only run the build:dist script, not the build:types script.

Expected behaviour

• build:types is run in CI
• dist/types would be present in the installed module.