fix: added og description (#5185)

Co-authored-by: Kapil Gowru <kapil-fern@Kapils-Fern-Mac.local>

Author: kgowru

fern/docs.yml

@@ -21,6 +21,8 @@ metadata:
   og:image: https://fern-docs.s3.us-east-2.amazonaws.com/fern-docs-og_image-compressed.png
   twitter:image: https://fern-docs.s3.us-east-2.amazonaws.com/fern-docs-og_image-compressed.png
   canonical-host: buildwithfern.com
+  og:description: Build better developer experiences. Generate SDKs in TypeScript, Python, Go, Java, C#, PHP, Ruby, Swift & Rust. Create interactive API docs with AI search.
+
 
 products:
   - display-name: Home