fix(github-actions): fix imports to actions/core given CJS

Author: devversion

github-actions/google-internal-tests/lib/main.ts

@@ -1,4 +1,4 @@
-import core from '@actions/core';
+import * as core from '@actions/core';
 import {context} from '@actions/github';
 import {Octokit} from '@octokit/rest';
 import minimatch from 'minimatch';