fix: body is too long when create github release (#3249)

Co-authored-by: tadelesh <tadelesh.shi@live.cn>

eng/common/scripts/artifact-metadata-parsing.ps1

@@ -11,6 +11,10 @@ function CreateReleases($pkgList, $releaseApiUrl, $releaseSha) {
     if ($pkgInfo.ReleaseNotes -ne $null) {
       $releaseNotes = $pkgInfo.ReleaseNotes
     }
+    # As github api limit the body param length with 125000 characters, we have to truncate the release note if needed.
+    if ($releaseNotes.Length -gt 124996) {
+      $releaseNotes = $releaseNotes.SubString(0, 124996) + " ..."
+    }
 
     $isPrerelease = $False