Fix typo Update README.md (#3086)

# Pull Request Title: Fix Typo in README.md

## Description
This pull request fixes a typo in the `README.md` file. The word
"avaiable" has been corrected to "available."

### Changes
- Corrected the typo in line 9 of
`examples/social/web-frontend/README.md` from "avaiable" to "available."

## Related Issue
- No related issue.

Signed-off-by: Hack666r <[email protected]>

Author: Hack666r

examples/social/web-frontend/README.md

@@ -9,7 +9,7 @@ on port 8000. Also make sure you have performed the operations mentoined in this
 
 The app is an example of a social app, and will be improved with future updates. Users can see their post by `ownPost` query in GraphiQL IDE.
 
-#### Operations avaiable:
+#### Operations available:
 
 Post, Likes, and Comments (only by the creation chain).