Log graphQL error codes (#5872)

Part of #5808

Author: alexr00

src/github/githubRepository.ts

@@ -256,7 +256,7 @@ export class GitHubRepository implements vscode.Disposable {
 		try {
 			rsp = await gql.query<T>(query);
 		} catch (e) {
-			Logger.error(`Error querying GraphQL API: ${e.message}`, GitHubRepository.ID);
+			Logger.error(`Error querying GraphQL API: ${e.message}${e.graphQLErrors ? `. ${(e.graphQLErrors as GraphQLError[]).map(error => error.extensions?.code).join(',')}` : ''}`, GitHubRepository.ID);
 			if (legacyFallback) {
 				query.query = legacyFallback.query;
 				return this.query(query, ignoreSamlErrors);