Update GitHub Actions workflows. (#582)

This PR was automatically generated by the
update-workflows-ecosystem-providers workflow in the pulumi/ci-mgmt
repo, from commit 19c542b12a65e3f3ec1d8213111262a9887dcda0.

.github/actions/esc-action/index.js

@@ -0,0 +1,14 @@
+const fs = require("fs");
+
+const file = process.env["GITHUB_OUTPUT"];
+var stream = fs.createWriteStream(file, { flags: "a" });
+
+for (const [name, value] of Object.entries(process.env)) {
+  try {
+    stream.write(`${name}=${value}\n`);
+  } catch (err) {
+    console.log(`error: failed to set output for ${name}: ${err.message}`);
+  }
+}
+
+stream.end();