workflows,scripts: migrate to use GITHUB_OUTPUT

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

scripts/create-release-tag.js

@@ -19,6 +19,7 @@
 const { Octokit } = require('@octokit/rest');
 const path = require('path');
 const fs = require('fs-extra');
+const { EOL } = require('os');
 
 const baseOptions = {
   owner: 'backstage',
@@ -64,6 +65,9 @@ async function main() {
   if (!process.env.GITHUB_TOKEN) {
     throw new Error('GITHUB_TOKEN is not set');
   }
+  if (!process.env.GITHUB_OUTPUT) {
+    throw new Error('GITHUB_OUTPUT environment variable not set');
+  }
 
   const commitSha = process.env.GITHUB_SHA;
   const octokit = new Octokit({ auth: process.env.GITHUB_TOKEN });
@@ -74,8 +78,11 @@ async function main() {
   console.log(`Creating release tag ${tagName} at ${commitSha}`);
   await createGitTag(octokit, commitSha, tagName);
 
-  console.log(`::set-output name=tag_name::${tagName}`);
-  console.log(`::set-output name=version::${releaseVersion}`);
+  await fs.appendFile(process.env.GITHUB_OUTPUT, `tag_name=${tagName}${EOL}`);
+  await fs.appendFile(
+    process.env.GITHUB_OUTPUT,
+    `version=${releaseVersion}${EOL}`,
+  );
 }
 
 main().catch(error => {