Fixing typo.

cmd/api/movies.go

@@ -25,7 +25,7 @@ func (app *application) showMovieHandler(w http.ResponseWriter, r *http.Request)
 		We can then use the ByName() method to get the value of the "id" parameter from
 		the slice. In our project all movies will have a unique positive integer ID, but
 		the value returned by ByName() is always a string. So we try to convert it to a
-		base 1° integer (with a bit size of 64). If the parameter couldn't be converted,
+		base 10 integer (with a bit size of 64). If the parameter couldn't be converted,
 		or is less than 1, we know the ID is invalid so we use the http.NotFound()
 		func to return a 404 Not Found Response.
 	*/