fix: mock root request instead

Author: kielllll

tests/e2e/tabs/tools/install-core-fonts-field.test.js

@@ -36,14 +36,16 @@ test( 'should return download core fonts successful response', async ( t ) => {
 		.ok();
 } );
 
-const mockFailure = RequestMock()
-	.onRequestTo( `${ baseURL }/wp-admin/admin-ajax.php` )
-	.respond( { message: 'Something went wrong', ok: false }, 401, {
+const mockGithubError = RequestMock()
+	.onRequestTo(
+		`${ baseURL }/wp-content/plugins/gravity-pdf/build/payload/core-fonts.json`
+	)
+	.respond( { ok: false }, 500, {
 		'Access-Control-Allow-Origin': '*',
 	} );
 
 fixture`Tools tab - Install core fonts field test failure`.requestHooks(
-	mockFailure
+	mockGithubError
 );
 
 test( 'should return download core fonts error/failed response', async ( t ) => {
@@ -53,9 +55,5 @@ test( 'should return download core fonts error/failed response', async ( t ) =>
 	await t.click( run.downloadCoreFontsButton );
 
 	// Assertions
-	await t
-		.expect( run.downloadFailed.exists )
-		.ok()
-		.expect( run.retryDownload.exists )
-		.ok();
+	await t.expect( run.downloadFailed.exists ).ok();
 } );