fix: correct credit wording in all READMEs

Author: EnrowAPI

README.md

@@ -110,9 +110,9 @@ try {
 
 | Endpoint | Cost |
 |----------|------|
-| Email Finder | 1 credit/email |
-| Email Verifier | 0.25 credit/email |
-| Phone Finder | 50 credits/phone |
+| Email Finder | 1 credit/email found |
+| Email Verifier | 0.25 credit/email search |
+| Phone Finder | 50 credits/phone found |
 
 ## Links