docs: add missing options to emitter plugin documentation

- ContentIndex: clarify rssFullHtml default
- CustomOgImages: add defaultTitle and defaultDescription options

docs/plugins/ContentIndex.md

@@ -17,7 +17,7 @@ This plugin accepts the following configuration options:
 - `enableSiteMap`: If `true` (default), generates a sitemap XML file (`sitemap.xml`) listing all site URLs for search engines in content discovery.
 - `enableRSS`: If `true` (default), produces an RSS feed (`index.xml`) with recent content updates.
 - `rssLimit`: Defines the maximum number of entries to include in the RSS feed, helping to focus on the most recent or relevant content. Defaults to `10`.
-- `rssFullHtml`: If `true`, the RSS feed includes full HTML content. Otherwise it includes just summaries.
+- `rssFullHtml`: If `true`, the RSS feed includes the full rendered HTML content of each page. Defaults to `false`.
 - `rssSlug`: Slug to the generated RSS feed XML file. Defaults to `"index"`.
 - `includeEmptyFiles`: If `true` (default), content files with no body text are included in the generated index and resources.
 

docs/plugins/CustomOgImages.md

@@ -60,6 +60,8 @@ ExternalPlugin.CustomOgImages({
 | `width`          | number    | 1200         | Width of the generated image in pixels                            |
 | `height`         | number    | 630          | Height of the generated image in pixels                           |
 | `excludeRoot`       | boolean   | false                    | Whether to exclude the root index page from auto-generated images |
+| `defaultTitle`      | string    | "Untitled"               | Fallback title when a page has no title                           |
+| `defaultDescription`| string    | "No description provided"| Fallback description when a page has no description               |
 | `imageStructure`    | component | defaultImage             | Custom component to use for image generation                      |
 
 ## Frontmatter Properties