add permissions to examples

[dtinth]

in newly created repos, GitHub Actions now defaults to giving only read permission on the repository, and extra permissions must be explicitly specified in the workflow file

this led to a situation where GitHub Actions can publish to npm but couldn’t publish the tag to github

this pr adds the config with the permissions required

• fixes Add a requirement for git repo Settings's Workflow Permissions to the document #179
• based on Clearly explain token, permission and config requirements #197

[changeset-bot]

⚠️ No Changeset found

Latest commit: 8b0b4dd

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR