Updated nightly.yml from release to pre-release

Author: tarithj

.github/workflows/nightly.yml

@@ -67,6 +67,7 @@ jobs:
           tag_name: ${{ steps.tag_version.outputs.new_tag }}
           name: Nightly Build ${{ steps.current-time.outputs.formattedTime }}
           body: This is a nighly build and theres no guarantee that this build will work. If for some reason it dosent please use the last nightly build
+          prerelease: True
           files: |
             LICENSE.txt
             target/release/perling_vm