Fix the artifact command

Author: leeyi45

.github/actions/src/load-artifacts/__tests__/artifact.test.ts

@@ -90,8 +90,8 @@ test('tabs that can\'t be found are built', async () => {
   expect(execCall0).not.toContain('@sourceacademy/tab-Tab0');
 
   expect(execCmd1).toEqual('yarn workspaces foreach -pA');
-  expect(execCall1).toContain('--include @sourceacademy/tab-Tab1');
-  expect(execCall1).not.toContain('--include @sourceacademy/tab-Tab0');
+  expect(execCall1).toContain('@sourceacademy/tab-Tab1');
+  expect(execCall1).not.toContain('@sourceacademy/tab-Tab0');
 });
 
 test('install failure means build doesn\'t happen', async () => {

.github/actions/src/load-artifacts/index.ts

@@ -46,7 +46,7 @@ export async function main() {
     return;
   }
 
-  const workspaceBuildArgs = workspaces.map(each => `--include ${each}`);
+  const workspaceBuildArgs = workspaces.flatMap(each => ['--include', each]);
   const buildExitCode = await exec(
     'yarn workspaces foreach -pA',
     [...workspaceBuildArgs, 'run', 'build'],