feat(xo-lite): add changelog to gh release description

@xen-orchestra/lite/scripts/release.mjs

@@ -138,6 +138,17 @@ const ghApiUploadReleaseAsset = async (releaseId, assetName, file) => {
   return JSON.parse(await res.text())
 }
 
+const getChangelogForVersion = async (version, changelogPath = './CHANGELOG.md') => {
+  const changelog = await fs.readFile(changelogPath, 'utf8')
+  const escapeRegex = str => str.replace(/[.*+?^${}()|[\]\\]/g, '\\$&')
+  const escapedVersion = escapeRegex(version)
+
+  const versionRegex = new RegExp(`## \\*\\*${escapedVersion}\\*\\*.*?(?=\\n## \\*\\*|$)`, 's')
+
+  const match = changelog.match(versionRegex)
+  return match ? match[0].trim() : null
+}
+
 // Validate args and assign defaults -------------------------------------------
 
 const headSha = (await $`git rev-parse HEAD`).stdout.trim()
@@ -330,7 +341,13 @@ if (ghRelease) {
   step('GitHub release')
 
   let release = (await ghApiCall('/releases')).find(release => release.tag_name === tag)
+  const releaseNotes = await getChangelogForVersion(version)
 
+  if (!releaseNotes) {
+    if (await no(`No changelog found for version ${version}. There might be a problem with the version number.`)) {
+      stop()
+    }
+  }
   if (release !== undefined) {
     if (
       await no(
@@ -347,6 +364,7 @@ if (ghRelease) {
       target_commitish: headSha,
       name: tag,
       draft: true,
+      body: releaseNotes,
     })
 
     console.log(`Created GitHub release ${tag}: ${chalk.blue(release.html_url)}`)