fix(docs): typo in adding-new-post.md

Author: gavvvr

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

@@ -244,6 +244,6 @@ My recommendation for image compression sites.
 
 ### OG Image
 
-The default OG image will be placed if a post does not specify the OG image. Though not required, OG image related to the post should be specify in the frontmatter. The recommended size for OG image is **_1200 X 640_** px.
+The default OG image will be placed if a post does not specify the OG image. Though not required, OG image related to the post should be specified in the frontmatter. The recommended size for OG image is **_1200 X 640_** px.
 
 > Since AstroPaper v1.4.0, OG images will be generated automatically if not specified. Check out [the announcement](https://astro-paper.pages.dev/posts/dynamic-og-image-generation-in-astropaper-blog-posts/).