message: update how to customize reader page documentation
diff: @@ -162,20 +162,11 @@ The `techDocsPage` is a default techdocs reader page which lives in
  having to set anything up.
  ```tsx
  -<TechDocsPage>
  - {({ techdocsMetadataValue, entityMetadataValue, entityRef, onReady }) => (
  - <>
  - <TechDocsPageHeader
  - techDocsMetadata={techdocsMetadataValue}
  - entityMetadata={entityMetadataValue}
  - entityRef={entityRef}
  - />
  - <Content data-testid="techdocs-content">
  - <Reader onReady={onReady} entityRef={entityRef} />
  - </Content>
  - </>
  - )}
  -</TechDocsPage>
  +<TechDocsReaderPage>
  + <TechDocsReaderPageHeader />
  + <TechDocsReaderPageSubheader />
  + <TechDocsReaderPageContent />
  +</TechDocsReaderPage>
  ```
  If you would like to compose your own `techDocsPage`, you can do so by replacing
  @@ -183,42 +174,30 @@ the children of TechDocsPage with something else. Maybe you are _just_
  interested in replacing the Header:
  ```tsx
  -<TechDocsPage>
  - {({ entityRef, onReady }) => (
  - <>
  +<TechDocsReaderPage>
  <Header type="documentation" title="Custom Header" />
  - <Content data-testid="techdocs-content">
  - <Reader onReady={onReady} entityRef={entityRef} />
  - </Content>
  - </>
  - )}
  -</TechDocsPage>
  + <TechDocsReaderPageContent />
  +</TechDocsReaderPage>
  ```
  Or maybe you want to disable the in-context search
  ```tsx
  -<TechDocsPage>
  - {({ entityRef, onReady }) => (
  - <>
  +<TechDocsReaderPage>
  <Header type="documentation" title="Custom Header" />
  - <Content data-testid="techdocs-content">
  - <Reader onReady={onReady} entityRef={entityRef} withSearch={false} />
  - </Content>
  - </>
  - )}
  -</TechDocsPage>
  + <TechDocsReaderPageContent withSearch={false} />
  +</TechDocsReaderPage>
  ```
  Or maybe you want to replace the entire TechDocs Page.
  ```tsx
  -<TechDocsPage>
  +<TechDocsReaderPage>
  <Header type="documentation" title="Custom Header" />
  <Content data-testid="techdocs-content">
  <p>my own content</p>
  </Content>
  -</TechDocsPage>
  +</TechDocsReaderPage>
  ```
  ## How to migrate from TechDocs Alpha to Beta
  