Update 190-edit-mapping-issue-detail-issue-detail.mdx

correct typo

Author: wjteo

docs/190-edit-mapping-issue-detail-issue-detail.mdx

@@ -5,7 +5,7 @@ import Screenshot from "@site/src/components/Screenshot";
 
 
 
-- On the ERD, click `books`
+- On the ERD, click `issueDetails`
 - On the relational mappings list on the right, click on the edit icon of `issue_details`
 - Check all fields except `bookId` and `userId`
 - Click `Save and close`