edited excerpt field to follow the convention of the contents.lr file

Author: Queen-codes

content/community/write-a-blog-post/contents.lr

@@ -54,7 +54,7 @@ Once you have written your post, you can either send it to us (Markdown is easie
   ---
   pub_date: Replace this text with the publication date in YYYY-MM-DD format.
   ---
-  excerpt: This is an optional excerpt field. You can provide a summary of your blog post. If left blank, the first 100 characters of your pot will be used.
+  excerpt: Replace this text with a summary of your blog post. This is an optional field. If left blank, the first 100 characters of your blog post will be used.
   ---
   body:
   Replace this text with your post's content (minus the title). This field accepts Markdown for formatting.