workflows(anchor): set anchor builds as pre-release

Author: SaicharanKandukuri

.github/workflows/anchor-build-and-release.yml

@@ -82,7 +82,7 @@ jobs:
           name: ${{ env.VERSIONTAG }}
           bodyFile: release.md
           draft: false
-          prerelease: false
+          prerelease: true
           artifacts: '*-*-tarballs/*.tar.gz'
           makeLatest: true