fix: broken editPost link and update editPost logic (#487)

* fix: broken editPost link and update editPost logic

Fixed broken editPost link. Removed the ability to update
the editPost link inside each blog post for consistency.
The editPost button per blog post can still be hidden.

* docs: update docs for editPost

src/data/blog/adding-new-post.md

@@ -1,7 +1,7 @@
 ---
 author: Sat Naing
 pubDatetime: 2022-09-23T15:22:00Z
-modDatetime: 2025-03-17T17:41:19.776Z
+modDatetime: 2025-03-20T03:22:19.075Z
 title: Adding new posts in AstroPaper theme
 slug: adding-new-posts-in-astropaper-theme
 featured: true
@@ -71,6 +71,7 @@ Here is the list of frontmatter property for each post.
 | **_tags_**         | Related keywords for this post. Written in array yaml format.                                                                        | default = others                               |
 | **_ogImage_**      | OG image of the post. Useful for social media sharing and SEO. This can be a remote URL or an image path relative to current folder. | default = `SITE.ogImage` or generated OG image |
 | **_canonicalURL_** | Canonical URL (absolute), in case the article already exists on other source.                                                        | default = `Astro.site` + `Astro.url.pathname`  |
+| **_hideEditPost_** | Hide editPost button under blog title. This applies only to the current blog post.                                                   | default = false                                |
 
 > Tip! You can get ISO 8601 datetime by running `new Date().toISOString()` in the console. Make sure you remove quotes though.