Broken links in the docs

[nicolethoen]

### Borken links
- [ ] urls in the [PageHeader examples](https://github.com/patternfly/react-component-groups/blob/929ce7055abe95d693cbd014d8d2d33f5e092cc3/packages/module/patternfly-docs/content/extensions/component-groups/examples/PageHeader/PageHeaderBreadcrumbExample.tsx#L17) don't go anywhere.
- [ ] https://github.com/patternfly/react-component-groups/issues/570

[fhlavac]

RHCLOUD-37368